$-10-1+9-7$

$\frac{\left(-17\right)\cdot\left(-36\right)}{\left(-12\right)}$

$\frac{dy}{dx}=\frac{4}{9}y$

$\frac{5}{\tan\left(x\right)+\sec\left(x\right)}$

$\lim_{x\to\infty}\:\left(xcos\left(x\right)\right)$

$\frac{dy}{dx}=\frac{4+x+y}{8+x+y}$

$\frac{d}{dx}\left(x+2y^2=8\right)$