$4\left(x+2\right)-3\left(x-5\right)xy$
$-1-\frac{2x^3}{2}$
$\frac{d}{dy}8xy^4-\sqrt{y}+\frac{x}{y}=5x+7$
$\lim_{x\to\infty\:}\left(\frac{ln\:2\left(x\right)}{x+2}\right)$
$\:x^{2\:}+22x+242$
$5b-15b^2$
$-4n^2^n-\left|1\right|9$
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