$8-2\:x\:2+6+7\:x\:3-3\:x\:4+16$
$\frac{4x^3+8x^2+7x+9}{2x+1}$
$\left(x-11\right)\left(x+9\right)$
$\left(7-3y^5\right)^4$
$\left(\frac{1}{7}xy-\frac{6}{7}z\right)^2$
$\log\left(x-6\right)=\log\left(4x-9\right)$
$37+12,35$
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