I am interested in a subject that is only tested on exercises, however it has also a lengthy theory. I have gone through the theory and I have made notes on parts I wasn't aware of at first. I have also gone through the introductory exercises by myself and I have made notes on points I wasn't aware of at first. The length of that 'book' is quite, about 50 pages of convoluted notes and subnotes that may expand to other material or between one another. The question is, is it of great value to go through those notes or go through new exercises only? Or should I combine it somehow?