Look at the score. If the score of the calculation question is very large, then ask the students who want to have a meeting quickly. If you think you can't answer the calculation, you can only answer 60 points. My major also includes chemistry. I took the chemical formula in the exam. Because of the tight time, I didn't recite the questions with high scores, and the structure diagram was directly empty. I passed it. This still depends on the score of your roll paper. Guess for yourself. You should know the approximate score after the make-up exam.