I'm not sure how to get from one expression to another.

According to maxima, the partial derivative of: $\displaystyle

\frac{x}{\sqrt{x^2+y^2+z^2}}

$ w.r.t x is:

Which makes sense to me, but Maple somehow managed to simplify it to the following, which I don't know how they did:Code:(%i7) diff(x/(sqrt(x^2+y^2+z^2)),x); 2 1 x (%o7) ------------------ - ----------------- 2 2 2 2 2 2 3/2 sqrt(z + y + x ) (z + y + x )

Only the second term is what I'm interested in, as that is what differs.

Thanks.