$13r+5s-2r$

$\frac{d}{dx}\left(\ln\left(\frac{x^5\left(x-4\right)^4}{\left(x^2+2\right)^6}\right)\right)$

$-14\cdot10$

$\left(11x^2+2x+16\right)-\left(2x^2+x+2\right)$

$\frac{d^2}{dx^2}\left(2\right)\left(x^2+yx=1\right)$

$6x+2y^3$

$\ln\left(\frac{3e^3+2}{e^3}\right)=\ln\left(2e^{-3}+c\right)$