$$x + 4 x ^ { 2 } + 5 x + 4$$
$2\left(2x^{2}+3x+2\right)$
$$4x^{2}+6x+4$$
$$2\left(2x^{2}+3x+2\right)$$
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$4x^{2}+6x+4$
$$6x+4x^{2}+4$$