$x^2+x+1\le0$
$y+45=30$
$12x-12$
$12-\left|6-\left(15-8\right)\right|$
$\int\frac{5x-4}{\left(2x^2+x+1\right)}dx$
$\cos^2\left(116.4\right)$
$\left(xy+8\right)\left(xy+\right)$
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