In that case, I recommend you to use 53. I used 53 at that time.
Now I mainly brush the questions. May 3 rd, difficult questions and simple questions
Now you can practice difficult problems, and in the end, you can choose simple problems to practice your hands.
Subject chemistry, bought at that time, is finished.
I feel ok. My score in chemistry is 80, and my general test is 77,78, with a minimum of 74.