$6z-11>7$
$\frac{x}{1.9}=-4.7$
$\sqrt{x^2}-2x$
$5xy-7xy+12xy$
$\frac{18x^2+6x}{\sqrt[4]{2x^3+x^2+1}}$
$\frac{99}{5000}+\frac{1}{3\cdot50^3}-\frac{1}{64\cdot\:5^8}+\frac{1}{5\cdot\:\:50^5}$
$\lim_{x\to3}8$
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