Classmate, this can only prove that you are still in primary school, junior high school and senior high school. You didn't really come into contact with mathematics until you got to the university, or you chose this major out of your mind, and you will find that mathematics is an art (of course, there is a tree called Shu Gao in the university, and many people hang it). Looking back from your math teacher's point of view, you can teach math now. What a proud thing it is! If you are better at math than the people below, you will feel superior. In front of you scum, this behavior is equivalent to pretending. If nothing else, I still have to rely on comprehension, and finally end my point of view with a math problem.

Mathematical problems in primary schools