$\frac{x^{\frac{2}{3}}}{y^{\frac{1}{3}}}+\frac{y^{\frac{2}{3}}}{x^{\frac{1}{3}}}$

$\left(x+4\right)\left(x-4\right)-\left(3x-1\right)\left(5x+2\right)-\left(x-2\right)\left(x+1\right)$

$\left(\frac{3}{4}b-8c\right)^2$

$\frac{dy}{dx}=\frac{-2x^2-5x+8}{-6y^2-5y-6}$

$8x^2-48x+64$

$\lim_{x\to\infty}\left(\frac{3x}{1\cdot ln\left(1+2e^x\right)}\right)$

$\frac{5x^4}{x^3-4}$