Write some arithmetic and solve some equations, depending on the individual. Of course, you can also write related mathematical theories, such as solving equations. The solution of the simplest polynomial equation is called the unit root, which has an elegant structure and is still used by mathematicians to study some of the biggest open problems in mathematics. If you have taken algebra or physics class, you will encounter parabola. I hope it will help you. Too many marks can only show that you are not proficient in knowledge. The reason for the alteration is that the problem-solving ideas you established at the beginning of the problem-solving are wrong. Although you found this mistake in the later stage, it was wrong at first, so you must pay attention to the method.