This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell 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.