Changes:

• Option to automatically calculate the current selection, in tooltip
• Option to calculate the current selection, once in history
• Toggle fraction format action for custom keyboard shortcuts and keypad buttons
• Fix copy unformatted ASCII without units when unit is placed before quantity
• Fix solve() function with replace() function as first argument (fixes solve2() function)
• Fix "where" operator using (in)equality in variable
• Return x=a*e^(i*r) (with r instead of n) for abs(x)=x
• Minor bug fixes and feature enhancements

Changes:

• Place approximate value before exact in calculate as you type result
• Set ans variable to solution(s) of equation (as if solve() function were used)
• Option to disable cursor blinking
• a(i) and a[i] syntax (the latter with support for functions) for element in vector
• New function: factor()
• Use hours or minutes as default unit for conversion to time unit of expression with time format but no units (e.g. "0:00:12 to s")
• Always use four digits for year in date (e.g. "0064-07-18" instead of "64-07-18"), and support input of date using DD-MM-YYYY format
• Fix display of units automatically appended to expression in parse status
• Fix reading of expressions from file
• Fix solving of x^4-4x^3+10x^2-12x+1=0, and similar, in exact mode
• Fix dual/auto approximation when unable to find exact solution to equation
• Fix rounding in 1/# conversion to integer (e.g. "1/2 to 0.99")
• Fix unability to find approximate solutions to some high degree equations (e.g. "x⁴ − 4x³ + 10x² − 12x = −1")
• Fix automatic variable detection in select()
• Minor bug fixes and feature enhancements

Changes:

• Apply dual approximation/fraction to calculate as you type result, as regular result but with length restriction
• Add option to add/edit comment to history context menu, and save comments in result on exit
• Add "Search by Date" (also shows the date of the expression) to history context menu
• Improve decision to automatically convert unchanged quantity with unit
• Option to automatically group digits in input
• Option, in menu, to open settings folder(s)
• New functions: tripleProduct(), multilimit()
• Updated French translation
• Fix equals sign for calculate as you type result
• Fix segfault with calculate as you type of "-(300K" and similar
• Fix saving of two's complement input settings
• Fix erroneous HTML output after format of result with error/warning has been updated
• Fix case conversion of µ to M and similar
• Fix segfault with very large integer raised by very large integer
• Minor bug fixes and feature enhancements

Changes:

• Show language menu in preferences on all platforms
• Change "Hide number pad" to "Always show number pad", and add separate number pad when the option is not enabled
• Improve initial value and clear all other fields when edited field is empty, in number bases and floating point conversion dialogs
• Allow unit expressions for insert unit action, for custom shortcuts and buttons
• Set minimum characters to two for all completion with "Limited full completion"
• Support x without backslash for custom function argument condition
• Update parsed expression and calculate-as-you-type result if variable, function, or unit in expression has changed
• Improve support for small displays with low resolution/high scaling
• Update chain mode to match behaviour in Gtk UI
• Update calendar and floating point conversion dialogs after expression calculation
• Portuguese (pt_PT) translation
• Fixes for overwrite input mode
• Fix unresponsive expression field in some cases after smart parentheses has been applied
• Fix completion with both custom app font and custom expression font set
• Fix input of max value for number argument
• Fix memory leaks
• Fix segfault with recursive (self-referencing) function
• Fix input of negative exponent in scientific e notation with RPN syntax
• Fix parsing of 1°2'3" as 1°+2'+3"
• Improve handling of "where" expressions with inequalities
• Fix definite integral for 1/sqrt(1-x^2), with limits higher/lower than or equal to -1 and 1
• Fix crash with empty vector in plot function, e.g. plot([])
• Fix "did you mean..." warning for two implicitly multiplicated functions without space between (e.g. "atan2(a,b)atan2(c,d)")
• Minor bug fixes and feature enhancements

Changes:

• Option (enabled by default) to show expression status (parsed expression and calculated value) as you type in history list, instead of in tooltip
• Option to hide toolbar
• Option to preserve height of history list when keypad or number bases are shown/hidden
• Option to change the max number of history lines saved
• Option to show/hide hidden units (hidden by default) in units window
• Headers for keyboard shortcuts and actions lists to allow custom sorting
• Reduced minimum height (one line) of expression field
• Physical constants updated with CODATA 2022 values
• New function: allroots()
• New units: therm, thermie, IUNS calorie, rpm
• Additional names/symbols for turn unit
• Use symbol "cal" for thermochemical (instead of international table) calorie
• Change title and names/symbols of weak mixing angle (prepend "sin2" to theta variants)
• Return exact negative integers in log10()
• More conservative handling of infinity in equations
• Remove n from equation solution if possible using assumptions of x
• Fix subsequent tab completions after completion of unit with prefix
• Fix unnecessary parenthesis, with wrong color for closing bracket, around unit with exponent
• Fix convert button text, when toolbar style is not icon only
• Fix history list not cleared before reload if there are exactly one item
• Fix input of scientific E-notation using lowercase e in numbers using concise interval notation, in expressions
• Fix "bit width" and "signed integer" arguments in setbits()
• Fix a^(f(x))=a^(b*g(x)) where b=2 or b=3
• Fix auto/dual approximation with "where" expression
• Fix "where" expressions with multiple inequality statements for a single variable, e.g. "where x≥0 and x≤10"
• Fix crash when a variable name/symbol with more than 20 characters is used in "where" expression
• Minor bug fixes and feature enhancements

Changes:

• Improved history list efficiency
• Add two's complement input and binary bits to preferences
• Ask for the desired interpretation the first time percent addition is used (e.g. 100 + 10% equals 110 or 100.1)
• Hide expression tooltip (after 300 ms) when input resumes, if delayed expression status is enabled
• Download button in dialog shown when new version is available, on Windows
• Support for solving equations containing if() function
• Support for solving root(a, x)=b (requires rational value for ln(a)/ln(b))
• New functions: powertower() and multiples()
• New units for solar radius, mass, and luminosity
• Use parentheses for exponent using scientific notation (with power of 10)
• Support integer factorization of integers in matrix/vector, and of numerator and denominator in rational number
• Relaxed conditions for (x^a)^b = x^(a × b) and x^a × x^b = x^(a + b) when complex numbers are deactivated (fixes segfaults)
• Fix AltGr for input of operators on Windows
• Fix (ax + n)^2 > 1, where n is even and a is not 1, returning false
• Fix setbits() function
• Fix Number::equals(0, ..., true) when number is infinite (affects replace() function)
• Minor bug fixes and feature enhancements

Changes:

• Detection of potential spelling mistakes (a warning will be shown)
• Add support for n...m, j:k, and j:i:k syntax, for sequence of numbers, e.g. 1...3 = (1:3) = (1:1:3) = [1 2 3] (note that brackets may be required for colon syntax to avoid conflict with time format)
• Improved "where" operator, including improved output of parsed expression, support for previously undefined variable names, and assignments before expression (e.g. "a=2, b=2, a^b")
• Click on binary digit in bases dock to flip bit
• Improvements/fixes to conversion completion and menus
• Add retry and cancel buttons to error dialog after failure to save preferences, definitions, or workspace
• Add last result to stack when pressing Enter with empty expression (was unintentionally disabled)
• More rounding methods
• New units: LightSecond, LightMinute, and LightHour
• New functions: bitget(), bitset(), setbits(), integerDigits(), digitGet(), digitSet(), flip(), colon(), and foreach()
• Support for hexadecimal floating-point literals using 0x...p... notation (0x1.4p3 = 0x1.4 * 2^3 = 10)
• Add support for "decimals" "to"-conversion (display as decimal fraction)
• Allow plot grid values higher than 1 (true) to specify line width
• Improve handling of zero solution and initial guess in newtonsolve() and secantsolve(), and check validity of solution
• Change handling a vectors in multiple function arguments (of non-vector type) - return vector instead of matrix, require equal number of elements, and use the same vector index for all arguments for each function instance (e.g. atan2([1 2], [3 4]) = [atan2(1, 3) atan(2 4)]
• Set handle vector property by default, for text, date, and boolean arguments, and for arguments, in global non-builtin functions, without specified type, and enable parsing of vectors for text arguments
• Do not apply "read precision" setting to exponents for values with units
• Change from line to point (or dot) plot style for data with many discontinuous points
• lambertw(x*e^x, 0)=x if x>=-1
• Use parentheses for number with scientific notation in more cases
• Fix x and y reversed for paired matrix when using plot dialog
• Fix saving of handle vector function argument property
• Fix saving of multiple names after editing of existing unit
• Fix saving of preferences when a workspace, other than the default, is currently open and the general preferences file does not exist
• Fix dsolve(diff(y, x) = y), and similar
• Fix log(1, 1) (undefined)
• Fix "to"-conversion to prefix and add "prefix" conversion option (for optimal prefix)
• Fix segfault in newtonsolve() and secantsolve() when equation does not contain variable
• Fix conversion to angle unit for complex angle, cis and polar forms
• Exchange rates fixes
• Minor bug fixes and feature enhancements

Changes:

• Support for specifying a fixed denominator for display of fractions (e.g. "0.3 ft ➞ 1/8 ≈ (3 + 5/8) in")
• Restore decimal number base after closing programming keypad
• Improve appearance of conversion menu
• Save position of main window even if size has not changed from the default
• Always add result to history (even if identical to previous) if expression contains a function generating a random number
• Prefer capitalized function name (over name with underscore), when completing function name
• Return gcd of numerators divided by lcm of denominators in gcd() with non-integer rational numbers, and vice versa for lcm()
• Add units for mean Gregorian and tropical years
• Ignore underscore in number
• Replace defunct exchange rates source and fix bitcoin exchange rate
• Fix custom middle click button action
• Fix immediate calculation after selecting to-conversion completion
• Fix asin(x)=a, acos(x)=a, and atan(x)=a, when a contains an angle unit and default angle unit is set
• Fix output of value converted to unit expression with numerical multiplier in denominator, e.g. "➞ L/(100 km)"
• Fix segfault when trying to solve "(x*sqrt(x)-y*sqrt(y))/(sqrt(x)-sqrt(y))=x+sqrt(x*y)+y"
• Fix parsing of case insensitive object name ending with Unicode character when followed by another Unicode character in expression, e.g. "микрометр"

Changes:

• Fix besselj() and bessely()
• Fix display of matrices and vectors with complex number form other than rectangular (default)
• Fix conflict between decibel units (e.g. "0dB") and duodecimal 0d… syntax (now requires at least two digits)
• Fixes for title options in plot() function
• Add additional buttons and button menus to general keypad
• Add option to show all functions, units, and variables in tool button menus
• Add recently used objects to functions, units, and variables menus
• Add option to bypass dialog for functions in menu
• Add option, in context menu, to display text for tool buttons
• Open functions, units, and variables tool button menus using long-press or right-click (in addition to arrow button), and add keyboard shortcuts
• Use keypad tool button menu as context menu and show keypad type in title bar of keypad

Changes:

• Add option to disable tooltips in keypad or everywhere
• Add option to disable units and to interpret unrecognized symbols as variables (unknowns) to preferences
• Make closing of application with Escape key optional and disabled by default
• Hide name column in conversion list when applied to current result
• Add temporary option to unknown variable edit dialog
• Add Microship (PIC16/17) 24 and 32 bit floating point formats
• Add support for specifying position of sign bit in floating point functions
• Concise (e.g. "1.2345(67)") and relative (e.g. "5+/-2%") notation for output and input (disabled by default for concise notation) of interval
• Round high precision intervals enclosing integers for integer arguments
• Optimize rest of unit expression when converting to partial (insufficient) expression (e.g. 18MA×100ns to J = 1.8 J/V)
• New derived units: Debye, C·m, Daraf, F^-1, V/C, N/C, kcal, kcal/g, kJ
• Use international foot as base unit for rod
• Fix fibonacci() for non-integers and recursive use
• Fix conversion options presented for speed units (and possibly other)
• Minor bug fixes and feature enhancements

Changes:

• Allow multiple actions for keyboard shortcuts
• Add toggle precision, and min, max, or min and max decimals to available shortcut and button actions
• Add option to exclude units for unformatted ASCII copy
• Fix copy unformatted ASCII when local digit group separator is same as selected decimal separator
• Add option to automatically copy result
• Add optional value to copy result action, allowing expression copy and formatting selection
• Always set (primary) selection clipboard contents when whole expression is selected or selection is cleared, e.g. after calculation
• Support for custom default angle unit, e.g. turn, arcsec, arcmin
• Append default angle unit (instead of always radians) when converting value without unit to angle unit
• More consistent addition and removal of angle unit from function arguments
• Always interpret ./, .*, and .^ as entrywise operators if user intention is unclear
• Change order of operations to place entrywise and ordinary operators on the same precedence level
• Add function, kron(), for Kronecker product, and constants for Pauli matrices
• Add radius to planets dataset and update other properties
• Support replacement of unknown variables within variable values
• Fix besselj(0, 0)
• Fix incomplete calculation in tan() with try exact approximation
• Fix 0/0=0 equality (do not return true) and output of 2/0 (and similar)
• Fixes and improvements for newtonsolve() and secantsolve()
• Fix segfault when MathStructure is deleted after Calculator, and in destructor of calculated DynamicVariable (called from Calculator destructor)
• Minor bug fixes and feature enhancements

Changes:

• Improve abortion of slow calculations
• Fix segfault and inconsistent behaviour in calculation of a^n mod b when n is negative
• Add modular exponentiation function, powmod(), with support for calculation of modular inverse
• Do not make any difference between row and column vectors in magnitude(), norm(), and dot() functions
• Fix division and exponentiation of scalar by matrix/vector, e.g. 4./[8 4.5]
• Improve parsing of element-wise operators with comma as decimal separator
• Fix rref() with different units for different elements
• Fix segfault with empty vector in uncertainty calculation
• Fix segfault trying to solve cbrt(x)^(1/3)-x=0
• Fix segfault in handling of vector variable with uncertainty
• Fix segfault in function assignment with equals sign (e.g. F()=...), when an object with the same name already exists
• Fix segfaults in some corner cases
• Fix internal id does not exist error
• Fix erroneous simplification of sin(x)^2*y-cos(x)*sin(x)^2*y
• Do not try to calculate norm() and magnitude() for matrices
• Fix some memory leaks
• Fix order of argument titles in csum() function

Changes:

• Do not automatically by default set prefix higher than kilo for meter, gram, higher than 1 (no prefix) for second and litre, or lower than 1 for byte and bit
• Do not use recently introduced SI prefixes (R, Q, r, q) automatically by default
• Do not set automatic prefix if resulting multiplier is less than 1 or greater than 1000, with some exceptions (e.g. km)
• Default prefix unit property (use for gram, and few other units, instead of hard coded value)
• Option to change symbols used for output of digits 10 and 11 in duodecimal numbers (use A and B as default digits)
• Allow the same variable left and right of the equals sign (e.g. var=var+2), in variable assignment without colon, if the variable exists and the previous value is known
• Use Unicode symbol for minus in scientific e notation
• Do not show multiplier if exactly 1, in HTML output of scientific notation
• Prefer Nm (torque) over J when the result is a vector with three components
• Add "amp" abbreviation to ampere unit, and "thou" name for 1/1000 in (mil)
• Fix unit order for Nm and Ws
• Fix conversion from ounce (interpreted as fluid ounce) to litre with prefix
• Fix automatic reactivation of global object after deletion of conflicting object
• Fix parsing of scientific e notation when the number is extremely large and exponentiation fails because of floating point overflow
• Fixes for output of scientific notation using number bases other than decimal
• Fix prefix selection in denominator when multiplier is higher than the value of the largest prefix
• Fix segfault in multisolve()
• Minor bug fixes and feature enhancements

Changes:

• Fix retrieval of exchange rates from mycurrency.net and add alternative secondary exchange rates sources
• Align completion list to beginning of word, and do not reduce width of columns in visible list
• Add option to not format output (size, style, sub-/superscript)
• Add m/s³, m/s⁴, m/s⁵, and m/s⁶ as derived units (improves automatic unit conversion)
• Check that the output of command, in command() function, is a reasonably sane expression

Changes:

• Use history font for RPN stack list
• Use log() instead of log2() as alternative action on "ln" keypad button
• Conversion to any type of expression (e.g. "1000 BTC to million USD")
• Use current status of limit implicit multiplication setting during parsing of conversion expression
• New SI prefixes (R, r, Q, q)
• New units: ounce force (ozf), rack unit (U)
• Use standard form (sorting) for polynomials
• Improve consistency of behaviour when global units are replaced
• More consistent addition of units to expression without units for unit conversion
• Improvements and fixes for arg() and atan2() functions
• Fix completion (including segfaults) and expression tooltip on Wayland
• Fix RPN mode deactivated after application loses focus
• Fix interpretation of Myr (megayear) and Gyr (gigayear)
• Fix milli- and centimeter of water units
• Fix genvector() with for negative step size or expression as step size/number of steps
• Fix randuniform() function
• Fix automatic/dual fraction format after conversion (e.g. "8 to score")
• Fix inconsistently displayed parsing of "7d 5h" and similar
• Minor bug fixes and feature enhancements

Changes:

• Add "Clear history" to available keyboard shortcut and button actions
• Add option, in keypad button menu, to reset keypad position
• Show exchange rates source, and update time, for current calculation in tooltip
• New prime number functions: primePi(), primes(), nthprime(), nextprime(), prevprime(), and isprime()
• New functions for intervals and uncertainties: upperEndpoint(), lowerEndpoint(), midpoint(), and errorPart()
• Add meter of water and related pressure units, and more derived flow rate units
• Support for vectors and matrices in uncertainty propagation calculation
• Proper support for uncertainty propagation in total(), sum(), product(), and for() functions
• Simplify display of parsed expression (primarily for quantities with units)
• Avoid parsing of implicit multiplication as nested multiplication
• Allow use of curly brackets as alternative parentheses
• Include +/- statement in function argument without parentheses
• Return values for approximate variables in exact mode in dimension() and elements()
• Improve parsing of quotation marks as feet/inch or arcmin/arcsec (e.g. do not parse s" as sin)
• Partial Georgian translation
• Fix removal of additional keyboard shortcuts, after first removal
• Fix font dialogs when "Keep above other windows" is enabled
• Fix saving of sub-function precalculate property
• Fix exact calculation of re((a*i)^(n/2)) (wrong sign in some cases)
• Fix erroneous calculation in some cases with physical constants both outside and inside unit relations when interval calculation is set to interval arithmetic
• Fix segfault in Calculator destructor
• Fix segfaults in some corner cases
• Fix use of random numbers in iterative functions
• Fix writing beyond end of array during exchange rates check in some cases (results in activation of old style matrices)
• Fix automatic reactivation of deactivated global object if a function with the same name exists
• Do not convert function arguments which do not allow units (fixes "arcsin(0.5+/-0.1) to deg")
• Fix prefix after conversion to optimal unit when the optimal unit includes a prefix
• Fix exact calculation when function argument is an approximate vector variable (fail)
• Minor bug fixes and feature enhancements

Changes:

• Fix handling of Unicode powers for units in denominator, with adaptive parsing enabled (e.g. parse 10m/s² the same as 10m/s^2)
• Fix "+" ignored after "E" in number bases where "E" is a digit
• Fix scientific E notation with sign in argument when function is used without parentheses
• Fix lambertw() for values very close to zero
• Fix a*b^x+cx=d when a and c have different signs and d is non-zero
• Fix a^x+b^x=c when a and b is negative, and c is positive
• Fix segfaults in some corner cases
• Fix potential issues in handling of leap seconds (e.g. during subtraction of seconds from date)
• Fix name field not working in argument edit dialog
• var=a syntax for variable assignment with calculated expression
• Replace ounce with fluid ounce during conversion to volume unit
• Solve a^x+b^x+...=c in more cases
• Improve remainder/modulus for numerators with large exponents
• Truncate number in output of parsed expression and end with ellipsis if unable to display all decimals
• Improved floating point calculation and output speed, particularly for simple expressions with very high precision
• New functions: clip(), qFormat(), qError()
• Replace selection (instead of wrap in parentheses) on operator input if selection ends with operator
• Act as if two arguments are required when applying base-N logarithm to expression
• Show padlock (or "[P]") after protected expression
• Minor bug fixes and feature enhancements

Changes:

• Variable spacing of x values in plot (unless step size is used)
• Option to plot real and imaginary parts separately (enabled by default)
• Updated plot() function with arguments for specification of plot options (in any order after the third argument)
• Polar plot style
• Ask the user for the desired sinc() variant (unnormalized or normalized)
• Support for binary-coded decimals (BCD)
• Show names with underscore capitalized and with underscore removed (with some exceptions)
• Additional information units
• Units for volumetric flow rate
• Tradtional numbers (e.g. dozen, score)
• Show warning when log() is used with a single argument, and always show second argument of log()
• Make names with a single character followed by digits case-sensitive with suffix by default
• Accept more than two arguments in gcd() and lcm()
• Interpret a single vector argument as a list of arguments if function requires more than one argument
• Insert minus instead of executing RPN operation, on key press, when last character is e
• Updated Tab key behaviour, e.g. cycle through completion items on subsequent tab key presses, and traverse items if tab key is unbound
• Fix segfault when result is a currency with quantity of one
• Fix copy keyboard shortcut in expression entry
• Fix limit of floor(), ceil(), and trunc()
• Fix plotting of derivatives and integrals
• Fix randpoisson()
• Fix reactivation of object, after object that caused deactivation is removed
• Minor bug fixes and feature enhancements

Changes:

• Improve resolution and sizing of flag images
• Do nothing when Enter is pressed if expression is empty
• Restrict use of reciprocal in unit conversion, e.g. invert in "5m/s to s/m" (= 0.2 s/m) but not in "500/lb to g" (= 1.1/g)
• New mHg unit (allows use with prefixes other than milli)
• Always display abbreviated unit name (symbol) with abbreviated prefix (when unit only has short name)
• Minor improvements to automatic unit conversion
• Fix display of (1 + f(x))/n

Changes:

• Add option to show both parsed and entered (or only one) expression in history
• Add option to clear expression history
• Do not add duplicate results to history
• Improved result copying, with proper html format and ASCII option
• Do not replace *, -, / with Unicode operators if cursor is within quotation marks (apply same principles on paste)
• Do not perform automatic (continuous) conversion, from conversion view, if result contains no unit
• Use non-breaking narrow space as digit separator in reasonably short numbers, and between quantity and unit
• Improve appearance of icons with display scaling
• Update value of austronomical unit
• Fix segfault with local digit grouping when separator is empty (e.g. with ignore locale)
• Fix freezes and crashes with extrememly large vectors and matrices
• Fix segfault in matrix multiplication
• Minor bug fixes and feature improvements

Changes:

• Programming and algebra keypads
• Customizable keypad
• Customizable keyboard shortcuts
• Option to hide number pad (right part of keypad)
• Workspace (mode, history, and temporary variables) can now be saved (to a single file)
• New matrix syntax (column separated by space or comma, rows separated by semicolon, as in matlab)
• Do not make any difference between a vector and a matrix with a single row, or between a scalar and matrix with a single element
• Support input of functions, units, and variables with underscores omitted in names (e.g. µ0 = µ_0, FermiCoupling = fermi_coupling), with some exceptions
• Option to disable "simplified" percentage calculations (e.g. interpret 100 + 20% as 100 + 0.2 instead of 100 × 120%)
• Option to truncate numbers (instead of round to nearest) in result
• Convert K, Hz, and 1/m to J (and derived units) using conversion factor constants (e.g. 1/(550nm) to eV ≈ 2.25 eV)
• Allow use of M as 10^6 without unit
• New ksi unit
• New functions: divisors(), rate(), vertcat(), horzcat()
• New plastic number (ρ) constant, and new "hbar" name for reduced Planck constant, and add second Unicode codepoint for µ-sign in constants
• Allow zero (1st and/or 2nd argument) in comb() and perm(), and return zero if second argument (k) is greater than the first (n)
• Calculate statistical functions (e.g. mode(), min(), max(), percentile()) separately for each column of matrix
• Return the lowest value if there are multiple values with equal frequency in mode()
• Parse text argument as expression if concatenate function name is found in text string, and fix concatenate returning date
• Fix Unicode handling on platforms where char is not signed
• Fix bitrot()
• Fix segfault in multisolve() when initial order of equations is not optimal
• Fix segfault with empty sqrt inside sqrt, e.g. sqrt(1+sqrt())
• Fix incompletely calculated nounit(), e.g. in unit conversion
• Minor bug fixes and feature improvements

Changes:

• Unit and data set creation/editing
• Complete variable and functions editing
• Percentage calculation dialog
• Periodic table
• Show result in expression status tooltip (calculate-as-you-type)
• Horizontal toolbar with added units and plot buttons
• Favorite functions, units, and variables (shown in toolbar menus)
• Ctrl+Enter shortcut for approximation of current result
• New functions: linearfit(), quadraticfit(), cubicfit(), ramlatency(), parallel()
• Improved and extended parallel operator (|| is interpreted as parallel if units are used)
• Merged inv() and inverse() functions
• Allow nested subfunctions
• Solve x^(x^(-a))=b
• Fix pearson() and spearman()
• Fix a*sin(x)+b*cos(x)=c
• Fix display of incompletely solved equation with dual approximation in some cases
• Many minor feature enhancements and bug fixes

Changes:

• Show result index in history (click to insert value)
• Remove paste icons from history
• Double-click to insert history text
• Add insert value and insert text to history context menu
• Option to remove, protect, or move history item to top
• History search
• If there is no selection, copy the result/expression at cursor when using context menu
• Options to use (middle) dot as multiplication sign and regular slash character as division sign
• Move keypad button to last position in toolbar
• Ask (once) for correct interpretation of ambiguous implicit multiplication
• Improved simplification of radical expressions
• Improved Im(), Re(), and arg() functions
• Improved output of complex forms (other than the default rectangular) in exact mode
• Immediately return memory on MR clicked if entire expression was unchanged (or empty)
• Function for drill bit size conversion
• Fix crash when using the dock menu to show the RPN dock stack for the first time
• Fix link in new version dialog
• Fix parenthesis highlighting when cursor is at end of expression
• Fix initial value of interval display in preferences dialog
• Fix saving of approximation mode
• Fixes for equations with complex inverse trigonometric and hyperbolic functions with no solution
• Fixes for complex x^(ax)=b
• Fixes for localization on Windows
• Minor bug fixes and feature improvements

Initial version of the Qt user interface.