Simpy was a web-based personal and social bookmarking service.
The service launched in May 2004. In 2010, it was acquired by Reuters and ceased operation as a social bookmarking site in April of that year.
I would like to evaluate expressions with Simpy, but unfortunately I am unable to get a simple answer, the one I would get by hand if I had the time to perform all the computations. As far as I understand, Mathematica does it and yields 4 times the Simpy result, which is a big worry since I wish...