$\lim_{x\to\infty}\left(\frac{xlog\left(x\right)}{x^2}\right)$

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

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

$3y-7x+9=0$

$+2-9-1000+8$

$\left(x^2+y^2\right)y'=xy$

$2xydx\:+\:\left(3x^2-1\right)dy=0$