$$(4 { x }^{ 2 } +2x-4) \times (2 { x }^{ 2 } -5x+3)$$
$2\left(2x^{2}+x-2\right)\left(2x^{2}-5x+3\right)$
$$8x^{4}-16x^{3}-6x^{2}+26x-12$$
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$8x^{4}-16x^{3}-6x^{2}+26x-12$
