Tip: Get MyScript Calculator while it's free
MyScript Calculator is an awesome application so much so I can't see it staying that way forever it performs mathematical operations naturally using your handwriting. Easy, simple and intuitive, just write the mathematical expression on the screen then let MyScript technology perform its magic converting symbols and numbers to digital text and delivering the result in real time.
Tips: Solve complicated Math problem with Soulver
Soulver is an awesome calculator app that lets you write out your math problem with words, list, and other real language to get a real, useful answer without confusing equations.