$$\frac{x^{2}-4}{x^{2}+5x+6}\times\frac{x^{2}+x-6}{x^{3}-9x}$$
$\frac{\left(x-2\right)^{2}}{x\left(x^{2}-9\right)}$
$\frac{x^{2}-4x+4}{\left(x+3\right)\left(x^{2}-3x\right)}$
