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

This machine doesn't have nearly the amount of functions I was expecting! How can I calculate vectors when there aren't even trig functions!This is the reason American children can't compete on a global marketplace. This "tool" of education is more of a tool for procrastination for the American public. L'Hopital would turn in his grave! Newton would have an aneurysm!Such simplistic mathematics is best left to those whom the toy's description excludes - three year olds and below.For just a slight amount more, you could get an old yet durable graphing utility which would increase the amount you could teach your child by a factor of 10!In conclusion, there isn't enough here to warrant a buy. If I can't calculate a vector with it, it's rubbish.