Q.E.D.
Q.E.D. — from the Latin quod erat demonstrandum, “what was to be shown.” The abbreviation has been used at the end of syllogisms since at least the renaissance. But, as much as I love the Latin language, even I can admit that it’s fallen to disuse of late. So, I propose a new conclusions to proofs, a phrase that has a more modern spirit, but still conveys a sense of accomplishment and success: booyah.