My Daily Love Affair with Mathematics

I went home after studying in the evening and found that there was a girl in my house who claimed to be my childhood sweetheart. All her parents and neighbors knew her, but I had no memory. Until she blinked and said, "It's too hard for you to complain about me on the scratch paper every day... So I'm here." Later I discovered that when she was happy, the function images were all love curves, and when she was angry, she could get miracles wrong in probability questions. When I finally mustered up the courage to confess, she pulled out a final question: "I'll give you the answer once I solve it."