/sci/ - Science & Math

Does anyone know if there exists a solution manual for pic related?
I'm stuck on the following (excuse me if my formatting is bad its my first time using latex):
Let A and C be subsets of S, and let B and D be subsets of T. Prove the following statements about subsets of S × T:
...
[eqn](A \times B) - (C \times D) = (A \times (B - D)) \cup ((A - C) \times B)[/eqn]

Also, why don't I ever see this textbook ever recommended here? It seems really good for self learning since the whole textbook is basically "do it yourself". You're given some definitions and theorems but the majority of the chapters are exercises which require you to make intuitive leaps from the definitions and theorems.