Recomputing (formulas) is actually a pretty useful skill to have in almost all science classes, so you can store the least possible amount of formulas in your h

Recomputing (formulas) is actually a pretty useful skill to have in almost all science classes, so you can store the least possible amount of formulas in your head and still do very good at exams, unless they have very short time limits. And it's way more fun than cheating.