Of course they're not, but OP kind of implied that it wasn't necessary to read a lot of pages of mathematics when he said > you can't sit thru lots of pages of

Of course they're not, but OP kind of implied that it wasn't necessary to read a lot of pages of mathematics when he said > you can't sit thru lots of pages of mathematics text Even if you watch those videos, you still need to sit through lots of pages of mathematics if you want to master the subject.