Hi,
I have a really simple problem. Assuming that I have this simple code
sage: rho = function("rho")(x)
sage: J = function("J")(x)
sage: expr = -J**2/rho**2*Derivative(rho, x) + 2*J/rho*Derivative(J, x)
Is there a way in sage to have this expression in a more compact expression. That is to say
Derivative(J**2/rho, x)
Thanks, Loic
