Mark Marks's Companiony of Mathematical Equations

This book is a compilation of his notes and other writings that frederick engles put together. So at times this book is quite hard to follow. And there are quite a few moments where he says that mark contradicts himself here, or he uses the wrong mathematical equation,. Any ways, a it makes it very difficult at times to follow. But i just want to stress that you don't need to. I'm going to give you what you need in order to take away from this.