$4\sqrt{3}+8cm$

$\ln\left(\frac{5x}{\sqrt{x^2-9}}\right)$

$\int\left(18x+4\right)\left(9x^2\:+4x\right)^5\:dx$

$2\frac{dy}{dt}=-5x$

$\lim_{x\to\infty}\left(\left(x^{\frac{1}{3x}}\right)\right)$

$\frac{dy}{dx}=\frac{e^{5x}-2}{e^{6x+2y}}$

$2x\left(y+3\right)+\left(x^2-4\right)\cdot\left(\frac{dy}{dx}\right)=0$