It's the first paper of final exam, I have spent whole study week for this subject. But, I think I wasted my study week. I spent all time to digest those formulas which are provided in exam and ignored those derivation that should memorize. How genius am I. However, feel relax now because finally I can delete those formulas that stuffed in my brain for more than one week. And, my brain is so empty now due to I never touch the other two subjects which is going to test next week. Wondering can I digest all notes just in three days that other people use one semester to study?