If you spend a lot of time typing Microsoft Word documentswith mathematical formulas, let the Equation Editor format the text for you.

Both of the consortia creating common-core tests say they're improving their equation editors, but math experts say students won't have much trouble figuring out how to use them.

I saw an app a couple years ago that was an interactive equation editor/solver. You could type in an equation, move stuff around, etc, and it would solve for variables you may have in the equation ...

Windows patches: Microsoft kills off Word's under-attack Equation Editor, fixes 56 bugs Microsoft removes Equation Editor from Word after finding more attacks on Office users.