I am in Jiangsu, and the college entrance examination in Jiangsu is more difficult. The college entrance examination mode emphasizes the number of words. In your case, it's more common. Mathematics is to do more and practice more. Mathematics is not reading, you must be the master of doing. No matter whether the topic is difficult or not, you should do it yourself and practice your basic skills. Basic skills are solid, at the same time, I am confident and quick to do problems. The reasons may be difficulty, proficiency, mentality and so on. I believe you can overcome this difficulty!