During old centuries until year 2013 people are making an effort to learn the basic. Basic of everything including math. Now you don’t need to make an effort to solve even hard mathematical equation. All you need is to have this photomath app and think how you could hide your smartphone from your professor during exams. It will also show you have answer was derived.
This app is only available in iOS and WP. Check their website at https://photomath.net/