First of all, you asked high numbers, not mathematics, which means you didn't ask linear algebra, probability theory and mathematical statistics. In fact, these two parts are relatively simple, and both of them can get full marks. Next, let me talk about advanced mathematics. Derivation and integration of unary function are the basis of foundation and must pass the test. The difficulties are: the four basic concepts of function continuity, differentiability and integrability and their relations (basic concepts), the proof of mean value theorem (it is difficult to construct functions), multiple integration (the application of three formulas: curve integration of coordinates and curves, surface integration of coordinates and surfaces, Green formula, Stokes formula and Gaussian formula), mathematical modeling and module solution.