You only really need...
Maths is not really required - so even if you are a duffer, like me, I wouldn't worry. Just read and try to understand how the solutions are arrived at. As for the physics, just read and remember. Having a grounding in these subjects just makes it easier to understand the garbage you will be forced to learn (and then forget). Most of the ATPL schools (or even all) have the ability to teach you what you need in a few minutes flat. Your English skills however (comma!) will prove essential. Because unless you understand the question, you won't be able to answer.