$-\:20\:+\:3\:x\:<\:-\:50$
$m^2-11m+30\:\cdot\:m-6$
$\sqrt{2^2-x^2}$
$5-\infty^3$
$\frac{5x^2+x+2}{\left(x+1\right)\left(x^2+1\right)}$
$-n-\frac{17}{5}n$
$\frac{cscx}{tanx\:+cotx}$
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