$$( { x }^{ 2 } +2x-3) \times ( { x }^{ 2 } +x-2)$$
$\left(x+2\right)\left(x+3\right)\left(x-1\right)^{2}$
$$x^{4}+3x^{3}-7x-3x^{2}+6$$
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$x^{4}+3x^{3}-3x^{2}-7x+6$