if youve done it all before in class and in homework i think youll be fine...math isnt any harder for me when high it just takes an extra second or 2. ive also went into a history test ripped and didnt know shit and got an A.

edit: second thought, its an exam so its testing stuff you learned a long time ago so it might be harder to remember that far back when your high....i wouldnt do it unless its not worth alot of your grade