On Sun, Jun 10, 2012 at 10:18 PM, Alan Bromborsky <abro...@verizon.net> wrote:
>>
> When I factor_terms(simplify(A)) where
>
> A = -3.0*x**2*(x**2 + y**2 + z**2)**(-2.5) - 3.0*y**2*(x**2 + y**2 +
> z**2)**(-2.5) - 3.0*z**2*(x**2 + y**2 + z**2)**(-2.5) + 3*(x**2 + y**2 +
> z**2)**(-1.5)
>
> I get
>
> A = -(-(-3.0*x**2 - 3.0*y**2 - 3.0*z**2)*(x**2 + y**2 + z**2)**1.5 -
> 3.0*(x**2 + y**2 + z**2)**2.5)*(x**2 + y**2 + z**2)**(-4.0)

That's strange.  I've just copied and pasted the expression for A from
your latest E-mail and did factor_terms(simplify(A)) to get 0.

Are you sure you are trying in the latest master?

Sergiu

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