$y\left(8+z\right)+3z+3y^2$
$9-8r-13r$
$\lim_{x\to4}\left(\frac{\sqrt{x^2-7}}{x-1}\right)$
$-x^2-8x=-9$
$16x\:-\:10\:+\:2\:-\:5x$
$2u-11\le\:\:5u+6$
$11-2x<1$
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