$\frac{dy}{dx}\left(\frac{\left(x^2-8\right)^{\frac{1}{3}}\sqrt{x^4+1}}{x^6-7x+5}\right)$

$\frac{du}{dx}=x^3\sec\left(y\right)$

$\lim_{x\to0}\left(\frac{x^4-1}{x^6}\right)$

$\left(x^2-9y^2\right)-\left(3x-9y\right)$

$\frac{2}{\left(f+w\right)}=6$

$\lim_{x\to0}\left(\frac{ln\cos ax}{lncosbx}\right)$

$x^2-4x-2y+10=0$