$$\left. \begin{array} { l } { ( 3 ) ^ { 2 } } \\ { ( x + 5 ) \cdot 6 + ( x - 3 ) ^ { 2 } } \end{array} \right.$$
$9\left(x^{2}+39\right)$
$$9=3^{2}$$
$$9\left(x^{2}+39\right)$$
$$9x^{2}+351$$
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$9,\ x^{2}+39$
