Me and EminentJonFrost have come together and made this app. It is in lua, and it has about 5 or 6 built in math formulas. IT is not a calculator. It has sphere, rectangle, triangle, pyramid, and others. The link:
I didn't include this in there, but credits goes to:
whitehawk - If it wasn't for the tutorials, would of never gotten into lua.
PSPMillionare - Helped me in the lua help thread with this app.
EminentJonFrost - Obviously help me code this, and teach me how to code menus.
And of course, PSPupdates for keeping up to date on the current news!