$\frac{dy}{dx}\left(51=4y^2+y\sqrt{4x^2+y^2}\right)$

$\lim_{x\to infinito}\left(\frac{x^2-4}{x^2-16}\right)$

$-2x^4+6x^2-4x$

$\frac{dy}{dx}=1+\sqrt{y-2x+2}$

$\frac{x\sqrt{x^{2+1}}}{\left(x+1\right)^{\frac{2}{3}}\:}$

$\frac{d}{dx}\left(\frac{1}{x^2}-\frac{3}{x^4}\right)\left(x+5x^3\right)$

$6w+6=30$