LeoCalculator   
by Leonid Sakharov   

LeoCalculator is an application for performing calculation of mathematical expressions that could include basic operations but also functions, brackets and definitions of variables.
To complete registration you need to know the Registration ID for the installed product on the computer you plan to use this product on. If not yet download you can do free here: http://www.leokrut.com/LeoCalculator.zip. Push the button "Registration" and read it on the appeared dialog box. You will get your password (reg code) at once after confirmation of payment and with it an unlimited access to all LeoCalculator features.