Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: The worst Math book I've ever read!

This book is worthless, a far cry from a clear understanding of differential equations. I'm engineering major and never have I had such a hard time comprehending a textbook. The solutions manual is even worse, making it extremely difficult to check yourself when working the problems. If you are a professor and are thinking about using this book please don't and if you are a student and you need this book I feel for you.