Find ${\rm d}y/{\rm d}x$ and simplify as much as possible, $y=x/(2x+5)^3$ My answer is $-6x(2x+5)^2+(2x+5)^{-3}$. I am wondering if my answer is right and whether I am able to simplify more? 

$$
y = x(2x+5)^{-3} \\
\frac{dy}{dx} = x(2(-3)(2x+5)^{-4}) + (2x+5)^{-3} \\
= (2x+5)^{-4}(-6x +2x+5) \\
= \frac{5-4x}{(2x+5)^4}
$$
