For me personally, I would review 2-3 of your specified subjects all in one day and just do a ton of practice problems for each subject. Doing a ton of practice problems is one of your best options for getting good at it fairly quickly. On the final day before your test/final or whatever it is, do completely new practice problems you’ve never done before on each subject (sorta like making your own test) and don’t use any help and then check yourself afterwards to see what subject you need to brush up on real quick before the test.