$\frac{d}{dy}\left(-6x^3y^2+3e^{2x}y^2-y^3=0\right)$

$\ln\left(x^2-1\right)-\ln\left(2x+1\right)-\ln\left(x-1\right)$

$-7x-8\ge-9+9x$

$\frac{x}{\sqrt{16+x^2}}$

$\int\left(2rsin\left(2r\right)\right)dr$

$35,6\sqrt{4}$

$\frac{dy}{dx}=\frac{kxy}{\left(x^2-1\right)\left(y^2\:+\:2\right)}$