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>>> from sympy import *

>>> x = Symbol('x')
>>> y = Symbol('y')

>>> x + y + x - y
2*x


>>> (x + y)**2
(x + y)**2


>>> ((x + y)**2).expand()
x**2 + 2*x*y + y**2

>>> pi**2
pi**2



>>> pi.evalf()
3.141592653589793238462643383


<<< E**2
exp(2)


>>> oo > 99999
True

>>> oo + 1
oo

>>> integrate(6*x**5, x)
x**6


>>> integrate(log(x), x)
x*log(x) - x

>>> integrate(2*x + sinh(x), x)
x**2 + cosh(x)