So I've been having a bit of difficulty keeping up with my calculus II class---that is to say, the tests. I feel like I've been studying sufficiently for the tests, but every time I walk in for an exam I realize how much I don't really know. I've attached a sample of some exam/tutorial problems so you all can gauge the difficulty.

I know that in the end the teacher will curve heavily, but at least going forward I'd prefer not to be at the mercy of the curve, so I'm looking for some suggestions for some difficult sets around the level of the problems I've attached---I know all the answers and how to solve them, so you needn't worry about that---and the trouble for me has been finding quality computational (i.e. engineering calculus) problems, since all of the real calculus books thrown out around here are more analysis/proof-based.

The ones that've been the hardest for me are 3, 10, 12/13 (but mainly since they're just involved), and 26.

Thanks!

https://docdro.id/qorMewn