Instruct: Classify a given review as either positive or negative.
Query: Do NOT buy!

I had to buy this book for the Pre-Calc class I am taking this summer semester. Since it's a summer class, we are moving at a very brisk pace. The instructor covers the basics, but I expect the book to be able to fill in the gaps. This book does NOT do it. I've attended every session so far and only five classes in, I feel totally lost. She tells us to do not only web assignments, but to do the book questions as well. Well, that would be just fine and dandy if this book actually explained to you how to do those questions! This is by far the worst math book I have ever laid my hands on and I do NOT recommend.