$$x-1/ { x }^{ 3 } -2 { x }^{ 2 } -x+2$$
$-2x^{2}+2-\frac{1}{x^{3}}$
$$-\frac{1}{x^{3}}-2x^{2}+2$$
$$-\frac{1}{x^{3}}+\frac{\left(-2x^{2}+2\right)x^{3}}{x^{3}}$$
$$\frac{-1+\left(-2x^{2}+2\right)x^{3}}{x^{3}}$$
$$\frac{-1-2x^{5}+2x^{3}}{x^{3}}$$
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$-\frac{2x^{5}-2x^{3}+1}{x^{3}}$
