Cheat paper ( chemistry ) need help

So in P.E exam we were not check strictly,only just admit card and one two pocket check thats it .so i made up my mind tht i will go with cheat paper in physics paper, i made a whole page formulas cheat and inserted it in my tie ( was successful in making it in). But to my surprise i got to know tht i can’t even make a useful cheat paper , most things i wrote was useless.

Need help in most important things for chemistry, formulas-reaction-derivation etc.

( i want to score good anyhow😭)