Then don't do it yourself, first figure out the formula yourself, then spend some money to work outside and study, and then you will do a lot better by yourself. If you want to take a lecture, you need a good teacher. There is no need for a tutor at this time. If you don't care about money, get a tutor. You'd better find someone to take you to the college entrance examination first. It takes a long time for a person to watch one, so that he can't grasp the college entrance examination. You have other things to learn. Spend money to buy time