From the developer: ""Draw functions, evaluate any math string, and perform calculations with complex numbers. SunCalculator allows basic and advanced algebraic and trigonometric calculations, complete managing of complex numbers, and drawing, saving, and printing of algebraic, trigonometric, inverse, or hyperbolic functions. There is a function (expression) evaluator for an unlimited range of functions. SunCalculator has a built-in text editor that allows you to paste images of drawn functions and then add text with all kinds of formatting. Features include a geometry calculator, MDI support in GraphMode, drawing polar functions, and more.

""Version 5.7 changes: Matrix calculator added, with many advanced options, with full suport for complex numbers: operations, determinante, inverse, adjoint end more. It is possible to solve linear equations up to 20 variables in size. Drawing Gamma function, nd evaluationg Gamma and Beta functions added.""