$\lim_{x\to0}\left(\frac{1}{4\left(2x+3\right)^3}\right)$

$\lim_{x\to0}\left(\frac{2+x^2+\cos\left(x\right)}{x^{16}}\right)$

$\left(-12x+8z\right)\left(12x-8z\right)$

$2x-1>3x$

$dy=\left(x-3y\right)dx$

$\int\left(x\left(x^2-9\right)^4\right)dx$

$\frac{dy}{dx}=x^5\left(y-2\right)$