Ah, nostalgia-hit. I still remember sitting in class and watching the teacher arrive at that equation step by step, and when it was there it was just about the

Ah, nostalgia-hit. I still remember sitting in class and watching the teacher arrive at that equation step by step, and when it was there it was just about the most mind-blowing thing I'd ever seen. "You mean all that messy junk we've been learning actually combines to form something... simpler?"