$x-2>4$
$-8\cos^2\theta\:+2\cos\theta\:=-1$
$x+3+x+1x^2+x-2x^2+x-2$
$\left(26-12\cdot3\right)$
$-3+7+1-4+5-12+9$
$3r-t+s;\:r=7;\:s=-5;t=8$
$9-250+5$
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