You are sitting in class during extra lessons, you are not doing so badly at school, but your knowledge of mathematics leaves much to be desired, so you stay in class on Tuesdays and Thursdays.

Naturally, you are not happy about this, because the teacher who taught mathematics, although kind, was terribly out of control of his emotions, that is, he only suppressed them and could not cope with them, but for some reason you began to notice that he tried to be polite with you

"You need to... just add this example"

Well, or it just seems that way to you