Numbers are divided into three parts, calculus, linear algebra and probability statistics. Compared with calculating one and two, calculus is very simple. So is linear algebra. Probability statistics is more difficult than number one, and number two has no probability statistics.

If you review well, it's not difficult. And mathematics is more important, 150, just like professional courses.

Mathematics review is particularly time-consuming. You need to lay a good foundation, read more textbooks and do more problems.