Oh Noes - but Math? (possible use for Khanmigo)

Okay, so I was thinking, you know how in the computer programming course, when you're typing out your code, you have Oh Noes, the Error Buddy, pointing out your mistakes, right? So what if in math courses, we have something like that where you type out your process, and Oh Noes tells you if you're doing something wrong! It'd be useful for students to really get a hold of the processes and avoid confusion if they're doing something wrong.