$16\cdot22$

$e^{xy^{-1}}$

$\left(\left(2x^2+3x-22\right)-\left(4x^2-5x+7\right)\right)+x-4$

$2x^2\le8$

$y'=-4ty^2$

$\lim_{x\to1}\left(\frac{x\cdot e^{\frac{x}{2}}}{x+e^x}\right)$

$\frac{dy}{dx}=\frac{\left(y+1\right)\left(x+3\right)}{\left(y+2\right)\left(x-1\right)}$