I noticed that you bid on a project for "Step-by-Step Computer Algebra Calculators for Math Site".
I just wanted to point out that I've developed an open source C# library for automatic simplification of algebraic expressions. It's availalbe on github:
[url removed, login to view]
It might come in handy for your project. :-) If you need any assistance tailoring it to your specific application, feel free to get in touch.
(I'm sending this message through the "hire me" function because I didn't see how else to get in touch with you. I'm not actually trying to hire you. :-))