$-x^2+10x-9\ge0$
$2x+2y-3z=1$
$2ab-30$
$\sin\left(60\right)=x$
$-321\:-\:987$
$\lim_{x\to0}\left(\frac{\sqrt{x^2+5}-3}{x^2-2x}\right)$
$\int\left(\frac{1}{\left(x-1\right)\left(x+3\right)}\right)dx$
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