Divendo/math-dragon — pull request #33 by arianvp (2013-12-22 23:00:27+00:00)
Title: Fixed Wolfram|Alpha bugs.

Did this by giving all operators an appropiate toString method with good
parenthesing. Strings returned by Symja were ambigious to Wolfram|Alpha
in some cases and by building our own query strings we lose this
ambuguity.