# Derivative of a fraction and power

I'm trying to take the derivative of [x/x^2+1]^3. Where do I start?

Start as how you start to any derivative, difference quotient.

as I interpret
$$(\frac{x}{x^2}+1)^3$$

start with the chain rule with power rule , then quotient and difference rule .

mathman
$(\frac{x}{x^2+1})^3$ or $(\frac{1}{x}+1)^3$?