For mathematics, you can't do without enthusiasm. You can only recite formulas and learn passively forever. It is easy for students to be enthusiastic. The teacher will ask some difficult questions in class and no one in the class will answer them. Don't give up at this time, try to read some knowledge about it. Even if you can't do it, the process of thinking is good; If you do it right, you will feel great satisfaction and enthusiasm (everyone wants to express themselves in this way)