$x^2-12x=18$
$19\cdot5\cdot0.5$
$\frac{d^7}{dx^7}\left(x^2+7\right)$
$\left(\frac{1}{3}mn^2y^7\right)^6$
$\frac{n-2}{2}=4$
$3x^2-4\ge\:5$
$x\left(z+2\right)$
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