I didn't bring any stationery related to math class today. I feel very annoyed and regretful about my behavior. Mathematics class, rigorous course should bring all tools, so as to have a normal class. Then I didn't bring a relatively complete tool in this class, so I am very sorry for such behavior.

Then promise not to make such a mistake again. Before each class, I will definitely check whether I have all my tools with me, if this happens again. Then the teacher can punish me.

So it can be written like this.