The upstairs said that the make-up exam is easier than the final exam. In fact, the current situation in Polytechnic University is that before the final exam, the proposition teacher sent two papers to the Academic Affairs Office, one as the final exam and the other as the make-up exam, but the specific one as the final exam was randomly selected by the Academic Affairs Office, and the proposition teacher had no right to decide or know. So the difficulty of the two papers should be similar.
Reading is the premise, and the questions of the past years should also be done. I suggest you find a classmate with good grades to help you cross out the chapters you don't need to read (for example, the physical application of unary calculus is generally not tested, but the application of geometry is tested; Taylor formula has hardly been tested), read the book carefully, and then do a few calendar year problems to consolidate the textbook knowledge in doing the problems. The papers published by Polytechnic University are relatively "dead", and the same questions over the years often appear repeatedly, sometimes just changing numbers and trying to get those questions. Therefore, it is absolutely no problem to finish the three calendar year questions carefully and pass the make-up exam.
Good luck with everything.