$$(2 { x }^{ 2 } +5x-3) \times (5 { x }^{ 2 } +3x-1)$$
$\left(2x^{2}+5x-3\right)\left(5x^{2}+3x-1\right)$
$$10x^{4}+31x^{3}-2x^{2}-14x+3$$
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$10x^{4}+31x^{3}-2x^{2}-14x+3$
