One solution for that is to get a copy of a textbook I wrote called Basic Training in Mathematics.

解决办法之一,就是买一本我编写的教材,书名叫《数学基础训练》

耶鲁公开课 - 基础物理课程节选

The next lecture will be among the more mathematical, although it's very elementary.

下一讲中,会有比较多的数学内容,都是很基础的知识

耶鲁公开课 - 金融市场课程节选