This week's giveaway is in the Android forum. We're giving away four copies of Android Security Essentials Live Lessons and have Godfrey Nolan on-line! See this thread for details.

As far as I know, the purpose of MathML is more to specify mathematical formulas so that they can be rendered in mathematical form. It's not really meant to specify formulas so that you can fill in values and "execute" (calculate) the result of the formula.