$6\left(4+3\right)$
$x^2-1=99$
$4a^{36}-16$
$x^2+8x=9$
$\:\left(m+n\right)\:\left(m+n\right)\:\left(m+n\right)\:\left(m+n\right)$
$5x\left(2x-7\right)$
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