$$4 { x }^{ 2 } +3 { x }^{ 2 } y+2 { x }^{ 2 } { y }^{ 2 } z$$
$x^{2}\left(3y+2zy^{2}+4\right)$
$$x^{2}\left(4+3y+2y^{2}z\right)$$
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