I'm in the math department. The main courses of college mathematics majors are mathematical analysis, advanced algebra, complex variable function and so on. The difficulty is not the same as that of high school. Other science and engineering majors are all advanced mathematics, but the mathematics department is much more difficult to learn, especially mathematical analysis, which is the top priority of the university mathematics department. It takes a lot of effort to enter freshman year.

I don't know what college it is on the first floor. Indeed, for many college students, college study is very easy, but the mathematics department is not like this at all. Many of our classmates study hard and study math very hard. However, if the landlord really likes math, the math department is a good choice. After further study, whether it is this major or changing to finance or computer, it is very promising.

You can look at university textbooks, such as Mathematical Analysis published by Fudan University or East China Normal University Press, and feel for yourself.