It's weird for me to post today's diary until the sun came down. To tell the truth, I am trapped by the mathematics. Today's weather is suitable for me to take a deep breath in the forest. I am dying to live in the cottage in the forest when I am sixty years old. All I have to do is focus on the mathmetics instead of thinking nonsense. It goes without saying that reducing the frequency of being anxious about the exam is the top prioriy for me.