It is the first week of my university life. Everything seems to be fresh and interesting to me. Oh, wait, I should say that X ⊆ C, which that X stands for all courses and C stands for interesting courses. This is the new way of expressing my thought after I went to the CSC 165 class. At the beginning of the class, I felt that the class was tedious. However, it gradually became more and more interesting since the professor gave us a lot of examples from daily life. I was able to understand most part of the lecture, except the "Implication". I got confused by my own experience in daily life, My way of saying something seems to be different when I face the "Implication" problem. I felt that the tutorial class was easy. The quiz was too short and was much easier than the exercise I did before the class. I will keep working hard though. I appreciate the wonderful experience of studying Mathematical Expression and Reasoning for Computer Science.