$\left(x^2-\frac{3}{4}\right)\left(x^2-\frac{1}{4}\right)$

$\lim_{x\to\infty}\left(x-\ln\left(9x^2+13\right)\right)$

$\frac{48}{2x}$

$\frac{28.333}{27.666}$

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

$\frac{d}{dx}\left(-8x^2-3\ln\left(xz\right)-5yz^2+4e^z=0\right)$

$\left(sb+4^2\right)$