Instruct: Classify Amazon reviews into positive or negative sentiment
Query: mistakes, mistakes, mistakes!!!!

this book tries to cover a lot of material by briefly explaining each topic. bad idea mr. farlow! whatever happened to quality over quantity? even if you are looking for a summary of different ways of solving pdes, this is not the book to buy. plus the practice problems at the end of each chapter stink. even if you attempt to solve them, the answers in the back of the book are about 40% wrong.also note that in the back of the book there is a "pde crossword puzzle". what is up with that? are we to expect that mr. farlow assumes the student using this book will be so bored with the material that they need a crossword puzzle to escape the pains of learning pdes?if anything it does have a nice set of fourier transform tables in the back of the book, but this kind of thing can be easily found elsewhere.