$4xy\:+\:5x^3\:y\:-\:2y^4;\:\:\:si:\:x=1\:;\:y\:=\:-2$
$\left(-42\right)-\left(-15\right)$
$\lim_{x\to\infty}\left(\frac{-xe^{-x}}{2}\right)$
$\int x\sqrt{17x-14}dx$
$12x^2+29x-8$
$\frac{\sec\left(x\right)\csc\left(x\right)}{\cot\left(x\right)}=\sec^2x$
$2\left(3a-b\right)\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:$
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