College courses, advanced mathematics is generally a one-year course, with 5 class hours per week, less than 1 hour per day, totaling two semesters. It seems to take a long time, but in fact, advanced mathematics is not so unattainable. Advanced mathematics is nothing more than calculus+linear algebra. The content is not as abstract as the following math class, but it is still intuitive and easy to imagine. If the middle school mathematics foundation is good, it can certainly be mastered in a short time. Many people around me have finished all the contents of a semester two weeks before the exam.

How can I put it? There is always a gap between people. How much time you spend depends entirely on your math foundation and thinking quality. Generally speaking, after two months of hard work, it should be no problem to master high numbers.