$$\frac{ { x }^{ 3 } -2 { x }^{ 2 } -x+2 }{ x-1 }$$
$\left(x-2\right)\left(x+1\right)$
$$\frac{\left(x-2\right)\left(x-1\right)\left(x+1\right)}{x-1}$$
$$\left(x-2\right)\left(x+1\right)$$
$$x^{2}-x-2$$
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$x^{2}-x-2$
