I asked because I am aware that it is frowned upon. Memorizing anything in mathematics other than maybe the multiplication tables is seen as a cardinal sin, and you are supposed to remember mathematics by doing lots of practice problems. But I am doing them and I still forget at an embarrassing rate. Maybe my brain is just defective. Maybe mathematics is just not for me and I would be better to do something that is more fitting my brain. But right now all the time and effort spent studying mathematics on my own feels like a huge waste as it produces absolutely no results.