I don't want to take classes in math.
Face it frankly, going is the easiest way. If the reason for not going is that I can't learn anything and get up early, I personally don't think it's necessary to struggle. People must do things they don't like. If you don't want to go for other reasons, you can lie that someone has an emergency somewhere and needs emergency care. But after doing this, you will inevitably feel guilty and uneasy, because it seems that you are not good at making up lies. In addition, when you don't want to go next time, naturally refuse it face to face, which means that you want to feel at ease and won't spoil the broth. Otherwise, no matter how good the excuse is afterwards, people will understand that they are looking for reasons, but it is actually unnatural.