On Thu, Apr 17, 2008 at 6:23 PM, Friedrich Hagedorn <[EMAIL PROTECTED]> wrote:
>
>  Hello,
>
>  this term manipulation with collect() is wrong:
>
>  In [1]: y*z**2 + z**2*x*y
>  Out[1]:
>    2        2
>  y*z  + x*y*z
>
>  In [2]: collect(y*z**2 + z**2*x*y, y*z)
>  Out[2]:
>   2  2
>  y *z *(1 + x)

Indeed! Thanks for the bug report, this is now:

http://code.google.com/p/sympy/issues/detail?id=793

Ondrej

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