# How do you differentiate f(x) = x^3/(xsinx-3) using the quotient rule?

$f \left(x\right) = {x}^{3} / \left(x \sin x - 3\right)$
${f}^{'} \left(x\right) = \frac{3 {x}^{2} \left(x \sin x - 3\right) - \left(\sin x + x \cos x\right) {x}^{3}}{x \sin x - 3} ^ 2$