This is just a regular Python shell, with the following commands executed by default:
>>> from __future__ import division
>>> from sympy import *
>>> x, y, z, t = symbols('x y z t')
>>> k, m, n = symbols('k m n', integer=True)
>>> f, g, h = symbols('f g h', cls=Function)
Please note that the Google App Engine has a timeout of 60 seconds for commands, and that due to a quirk in Safari on iOS, the timeout on iOS is 58 seconds.
The thumbtack icon is from the Android Action Bar Icon Pack and is used under the terms "You may use the materials in this file without restriction to develop your apps and to use in your apps."
SymPy Live