$-8x\:-\:3\:+\:9\:-\:2x\:-7\:+\:x$
$-2,290+369,290$
$\:3x\:+\:2y\:-\:5\:=\:5x\:-\:2y$
$\left(2m-2\right)\left(4m^2+4m+4\right)$
$4x^2+12x+9-9x^2+42x-49+50x^2+40x+8$
$11-4+1-1-1-1-1-1-1-1-1+43$
$x^{-2}\left(x^2.\:y^{\frac{1}{2}}\right)$
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