$$(1 { x }^{ 2 } -8x+4) \times (2 { x }^{ 2 } +5x-1)$$
$\left(2x^{2}+5x-1\right)\left(x^{2}-8x+4\right)$
$$2x^{4}-11x^{3}-33x^{2}+28x-4$$
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$2x^{4}-11x^{3}-33x^{2}+28x-4$
