$19x^2\:+\:57x\:+\:38$
$3-\left(4-6\right)\cdot\left|-2-\left(6-3\right)\right|$
$2x-3a\left(x-4a\right)$
$\lim_{x\to\infty}\left(xe^{-x}ln\:x\right)$
$\int14\sec\left(7x\right)^4dx$
$\frac{60}{4}$
$\int\frac{5}{1+e^{-x}}dx$
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