Grading of postgraduate mathematics is given according to the steps. As long as the candidates do the questions step by step, the teacher will give points according to the steps. To what extent the steps are written, there are detailed scoring standards in the answers. The final answer is wrong, and the previous steps are all right, so directly deducting the final answer score will generally deduct about 2 points. Therefore, during the exam, try to write down the process and formula for the questions that you can't write, and generally there will be formula scores.