Eh. It’s alright, the nerds deserve it more than I do anyway.
I can’t solve your calculus problem, but you probably have all of the pieces of the puzzle in your own mind. You’re smart. There’s probably just one little puzzle piece that isn’t quite fitting right.
At least that’s my experience when I’m stuck trying to figure something out.
This may not work for you, but try resetting your mind off of the subject. Distract yourself entirely with something else, a game, a book, a show, whatever. Let your brain cooldown and once you feel relaxed, look at the information again and try to solve the puzzle.
Oh, and that’s one of three serious answers I’m allowed to give this year. Everything else is only allowed to be sarcastic or horribly inappropriate humor and self loathing.