Comment #100 on issue 1598 by smichr: New polynomials manipulation module
http://code.google.com/p/sympy/issues/detail?id=1598
test_expand() needs to have assumptions on x and y for the expansions to be
valid.
e.g. if a = sqrt(x+y) then 1/a**3 = 1/(a*x+a*y) is only if (x+y)>0.
I have finished rebasing 1766 on this and have made the pertinent changes.
I'm trying
to track down an odd behavior with an assumption right now and will push
when finished.
Nice to see polys in place!
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