Hi! I built this online calculator to give people the opportunity to calculate their daily, workers or school calculations in a visual convenient way. Now it supports: • Graphical representation of mathematical formulas. • Calculation results can have any number of digits and accuracy. • Works with the following types of numbers: real, integer, fractional, complex. • The measure of an angle can be changed. • Commonly used mathematical functions and constants are supported. • User variables and functions are supported. • Uses units and unit systems and can translate values between them. • Automatic recalculation of expressions helps users observe the results of calculations when editing formulas. • Syntax highlighting. • A library of examples and visual documentation. There are desktop versions with the same features. I'd like to here some critique or other responses. Thanks!