Comment #14 on issue 2587 by [email protected]: Strange printing at SymPy
Live
http://code.google.com/p/sympy/issues/detail?id=2587
This is a simpler case that can reproduce the problem:
In [1]: from pickle import dumps,loads
In [2]: f=Add(Pow(x,2),Pow(x,-2)) # x**2+x**-2
In [3]: g=loads(dumps(f))
In [4]: g
Out[4]:
2 -2
x + x
In [5]: f
Out[5]:
2 1
x + --
2
x
In [6]: f==g
Out[6]: True
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