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

$\frac{dy}{dx}=\frac{yx^2+x^2}{\sqrt{1+x^3}}$

$2x\frac{dy}{dx}\:-lnx^2\:=0;\:y\left(1\right)=2$

$3+7x<12-5x$

$\frac{dy}{dx}=\frac{\left(8+14x\right)}{xy^2}$

$\int\:\sqrt{4x+\sqrt{x}}dx$

$-3.2^0$