Comment #3 on issue 2070 by asmeurer: All elements of .args should be Basic http://code.google.com/p/sympy/issues/detail?id=2070
https://github.com/sympy/sympy/pull/7 has taken care of the issues with Integral (it now uses Tuple, and instead of None, it uses a variable .arg format), as well as with Sum. Does anyone know of any other issues here, or should this be closed?
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