Describe the train of thought: start with the theme of review, first introduce why you review, then review the reasons for your mistakes in detail, and finally ensure that you won't make the same mistakes again. Text:

Dear teacher:

Hello!

I didn't get the ideal result in this math exam. To sum up, it is caused by the following aspects:

Did not review in place. The content of the exam was not carefully reviewed before the exam, which led to many knowledge points not being seen. As a result, there was something wrong with the exam, and I couldn't do it.

Not serious enough to do the problem. Among the mistakes, several problems are not self-defeating, but are divided because of careless process calculation errors, which is unforgivable.

The answer to this difficult problem is not good. This shows that there are still many defects in mastering difficult problems, which need further study.

Through this exam, I once again realized my own shortcomings. In the future study process, I will take it seriously, review it well and study hard actively.