Comment #23 on issue 2039 by smichr: Mul.eval_subs problems http://code.google.com/p/sympy/issues/detail?id=2039
There's no separate issue. I needed such a function for the Mul._eval_subs to standardize the input a little. I guess I could leave it out and leave *all* prep work to the calling routine.
And perhaps powdenest should be incorporated into powsimp as the exponent handler? And then powsimp would get the assume hint.
Is there a reason not to make the hint assume_positive rather than assume_pos_real?
In any case I made the changes to powdenest and added more doctests. I haven't made the tests part of the test suite, however. What is the sentiment towards duplicate tests in the docstring and test files?
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