Write down your equations with Math-o-mir, the mathematical paper. Math-o-mir is a simple tool for editing mathematical equations and writing informal mathematical text. It is not focused to one single equation but you can write down the whole mathematical procedure. Math-o-mir is also a decent formula typesetter.
Math-o-mir is not a number cruncher – use other tools for that purpose. However, a simple symbolic calculator is planned in future versions. Math-o-mir is also not intended to become an outstanding typesetter, just a decent one.
Math-o-mirs main competition is pencil and the back of an envelope.

MATH-o-MIR IS PORTABLE! You can simply copy Mathomir.exe to any computer or to USB key. If you wish, you can manually associate file type .MOM with Math-o-mir.

The license of this software is Freeware, you can free download and free use this calculator software.