$3\left(19\right)-\left(-12\right)$
$\left(\frac{1}{x^2}+3x^5\right)^n$
$\left(7x\:+\:14\right)\:+\:9$
$\frac{22a^9b^{10}}{2a^2b}$
$81x^4-16$
$x^2-2x-4>0$
$\lim_{x\to0}\:\left(e^{4x}-1\right)^x$
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