Well, the senior will tell you. Elective courses 2-2, 2- 1, 4-7 (optimization method), 4- 1 (geometric proof), 4-5 (inequality) and 4-4 (coordinate system and parameter equation) leave me alone. Let's see if there are any omissions.

Let me look for physics and biology. It seems that biology is an elective course, and physics is an elective course.

It was really discovered one by one.