Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Hard to Learn From

This book is very difficult to learn from, the examples are hard to follow, the ideas that are relatively simple are portrayed in such a way that they are confusing. The basic ideas on differential equations that are portrayed in the first chapter are manageable but as the book goes on, it gets more and more horrible. I would not recommend this as a teaching tool or as a supplemental reading aid. I am currently studying this subject and I, along with all of my classmates that i am acquainted with, dislike this book strongly and believe that it is a waste of money. I have had to buy additional textbooks to understand this subject