Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Terrible! Very abstract without Explainations

I agree with the other reviewers of this book. It is one of the worst Math books around. The explanations are very few and far between as well as being abstract. This isn't a good book for an introduction to Differential Equations. It should be called the "Previously Knowledge Assumed" Book. I think that the author takes for granted that people will be able to follow his thought process without the steps or assumptions or definitions.Avoid this book. It is very poor. I would have given it 0 stars if I could.