I didn't review at all during the exam. I graduated from high school for three years, and the content of the exam is not as difficult as that of high school. I got more than 400 out of 450. But I didn't take the advanced math test at that time. According to my experience, high numbers are not difficult.

Also, you can copy others' during the exam. As long as you can pass. Don't take it too seriously. Communication is communication, not something particularly formal. Although the state recognizes academic qualifications, the basic situation is to give money to get a certificate.