$f\left(x\right)=x^2\left(x+2\right)\left(x-1\right)$

$f\left(x\right)=x\left(x+2\right)\left(x-1\right)$

$f\left(x\right)=x\left(x+2\right)^2\left(x-1\right)$

$f\left(x\right)=x\left(x+2\right)\left(x-1\right)^2$