Hey guys I am taking a calculus course that is mainly on computation, no proofs. For the most part the computation is easy, but I struggle to solve "challenging" problems and I don't know how to practice for these problems. An example is I will attempt a solution to the problem but get no where even close in getting the answer. It seems no matter how long I sit and stare at the problem it's impossible to solve, unless I look at the solutions manual. That's the problem. I don't want to reference the solutions manual to "hard" problems because come exam time, there will be some "hard" problems and I wanna be able to tackle them with ease. Are there any tips to being able to solve these challenging problems? Thanks.