$$\frac{ 3 { x }^{ 2 } -4x+4 }{ (x-1)(x+1)(x-2) }$$
$\frac{3x^{2}-4x+4}{\left(x-2\right)\left(x^{2}-1\right)}$
$$\frac{3x^{2}-4x+4}{\left(x^{2}-1\right)\left(x-2\right)}$$
$$\frac{3x^{2}-4x+4}{x^{3}-2x^{2}-x+2}$$
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