$3\left(y\:+\:7\right)\:=\:2y\:+\:10\:+\:y$
$5m+4n-8m-3m^2n+2n+4m$
$17x-71=9x-47$
$2\tan^2\theta\:-\tan\theta\:=0$
$2x^3+3x^2-23x-12$
$\frac{1}{2}\:\left(x+y+z\right)$
$24-12x+6x^2-3x^3$
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