$\left(\frac{1}{x}-1\right)^{2}$
$2x-4\le0$
$4g\:+\:7\:-\:9g\:-\:12$
$\left(\cot x-1\right)=1-tc$
$216m^6-8n^3$
$6+32\cdot\left(-9+3\right)$
$\int_4^1\left(2x-3x^2\right)dx$
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