This little calculator is indeed relatively powerful! You can calculate any difficult expression with ('s, variables and even pre-defined functions. If you don't want to use that crappy Windows Calculator and type every term yourself, use EazyKalc and everything can be done much faster. The results are 99.9999% correct ;-). Source Code is included!

Downloads	.:
EazyKalc Windows (with VC++ Source) - 48 KB EazyKalc Linux - 168 KB