Then, as you have time, actually read the book. Mostly, make sure you know what those formulas are for and how to use them. There’s probably a lot of superfluous information between the formulas that you don’t really need, so skip or just skim over those parts.

Good luck!

Leraning methods do exist, are simple and effective, as are methods who allow you to read ten to twenty times quicker than you do now or to easily and quickly memorize everything you want.

Of course, you must learn the methods, first.

Learning how to learn is quite easy, you just need to read and then apply.

I’ll do some search to (re)retrieve some website, but in the meantime I can suggest you to look for books written by Tony Buzan (perhaps you can find them in your native laguage, as well), which are a sort of “classic”, by this point of view.