While my math class is going OK, I looked over the Math subject test for the GRE (not the general math test that everyone takes). I’ve forgotten a lot.
I’m slowly trying to re-teach myself a lot of what I’ll need to know: vector calculus, linear algebra, differential equations, and there is some stuff I don’t think I ever had before that I’ll probably need to take classes on.
The GRE subject test seems to test more for bredth than depth of knowledge.
I’m going to write a long post soon about going to school when your over 30. Suffice it to say, college is wasted on the young. I think everyone would get more out if it if they waited till they were about 21 to start college.