$\frac{dy}{dx}=\frac{2x\left(1+e^y\right)}{e^y}$
$\left(x+1\right)\left(y^2+1\right)=\frac{ydx}{dy}$
$\lim_{x\to4}\left(\frac{5w-14}{w+6}\right)$
$n^2-12n$
$1+\tan\left(-q\right)^2=\sec\left(q\right)^2$
$\frac{64m^3-125n^3}{4m+5n}$
$15x^2+5x^2+x-5\:entre\:3x+2$
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