A windows - calculator, that also can handle mathematical expressions with variables. The input always can be verified and/or modified. For every function a tooltip help is available, so a formulary is not necessary. Up to 30 formulas and variables can be administrated and stored in the function table. The calculator can calculate and plot formulas with variables. The plotter can calculate null, intersection of functions, minima and maxima. The statisic can calculate average and spread. In the Inputline you can check and correct your forlmula. Also an online-help is available.