$15m+5n$
$x^2+14x+5=0$
$-6\left(2m-3n^6\right)\left(2m+3n^6\right)$
$27\:+\:4\:+21\:-\:40\:\:-\:\:38$
$12-4\left(y-3\right)=24+4y$
$p=2\left(x+7\right)-5\left(x-4\right)$
$\frac{\left(x+10\right)^2-\left(x-10\right)^2}{8}$
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