Math requires accumulation, but it's not just about how many papers you do, buy a diploma, buy a degree.The crucial point is to establish their own set of mistakes, compared to the previous rough brush, sorting out the mistakes is more refined digestion.Since the winter vacation, I have been making mistakes every day.To sort out the wrong questions by hand is always the process of not copying the answers after excerpting the questions. This is to redo the wrong questions. This method can effectively master a class of problems.Buy certificates. Buy diplomas.Generally, we can find many similar problems in three days, and then we can focus on solving them. We are often puzzled by the slightly difficult polar coordinate problem, and through the above methods, we can solve this problem.In this virtuous cycle, math scores slowly improve.In addition to the usual collation and induction also strive to maintain a good state of mind: one is to guard against arrogance, two is to calm.Buy the certificate.Calm is to face each test when you tell yourself that this is just testing ability, do not covet.Just do your best and show your talent.