>>12243174Go learn all the stuff you were supposed to learn before you came in. If it was a calculus exam that you blew, go learn pre-calculus and don't skimp on the trig. If it was a calculus II exam, go back and learn calculus I.
Then learn the stuff you were supposed to have learned in the first part of the current class.
If you don't know how to do everything while tired and without looking at your notes, you aren't ready for a test. Remember this for next time.