My exams are coming within a month and my mind is blank right now! Just tell me how to cover all the portions
(5 subjects, each subject 20 chapters)

i will give 100 points... unsatisfied answer or spam will be reported immediately

Man same thing happend to me i just like review it all once and twice and it helps alot but for u it might take 1 week or 2.i could try to help u

Explanation:

Summary: Multiple spaced exposures is the key. Use surveying to cut down on your reading time without missing important ideas. Create a detailed notebook about how to solve all your equations and formulas. Review everything in full as many times as you can before your test. Test yourself at two-week intervals. Always sleep well, eat well, and exercise daily.

Explanation:

Source: https://www.quora.com/What-is-the-most-effective-way-to-study-a-huge-amount-of-information-for-one-test

Hope this helps.