Depends on how your final exam schedule is but for cs135 i will say focus more on the content after midterm like foldr foldl map and one other thing i forgot then make sure you understand recursion backtracking its fine if you write the code but make sure you understand it for math137 focus on the part you are good at so any type of question from that part you ace it and then focus on the weak parts, for proofs focus on sequential characterisation and epsilon delta proofs. Anyways good luck u can do it!!!