$\frac{\frac{x^2+6x+9}{x}}{x+3}$

$\lim_{x\to\infty}\left(\:\left(\frac{\sin\left(6x\right)\cos\left(e^{x^2+6}\right)}{x^6+6}\right)\right)$

$\int-7e^{-6x-3}dx$

$a^2b^2-2abc+c^2$

$m^3-4m^2+6m$

$\frac{\:1+\:sinx\left(x\right)}{cos\left(x\right)}=\:sec\:\left(x\right)+\tan\left(x\right)$

$\frac{dy^2}{dx}=\frac{5x^2}{4y}$