It's good you are being more humble on this thread. The song starts out somewhat repetitive, though fairly unique. I liked the jazzy lead piano riffs best. Ending is very abrupt. I took Differential equations in college. Very difficult & not fun; the professor was not very good either. One day he spent 20 minutes on the chalk board showing us how to do a homework problem, and then he realized he screwed up. He just said, "Well, you get the gist of what I was doing", and then moved on to something else. I barely passed (worst grade I've ever gotten in math), but I wasn't going to take it again just to get a better grade. Never had to use it once on the job, thank heavens.