Updates:
Labels: Simplify
Comment #1 on issue 3226 by asmeu...@gmail.com: high-order derivatives
should be cse-simplified
http://code.google.com/p/sympy/issues/detail?id=3226
If we do this right, it can also make it more efficient. The derivative of
g(f(x)) + h(f(x)) is f'(x)*g'(f(x)) + f'(x)*h'(f(x)), but this can also be
written as f'(x)*(g'(f(x)) + h'(f(x))), which is not only simpler, but only
requires computing f'(x) once.
By the way, what is csesimp()? That doesn't appear to be part of the git
master.
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