$\frac{120}{-60}$

$\left(6^8\right)^9$

$f\left(x\right)=\left(\frac{2x-1}{5-x}\right)^4$

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

$\frac{dy}{dx}\left(3xy^2+3y=2\right)$

$\lim_{x\to1}\left(\left(x-1\right)\cdot\frac{cos\left(x\right)}{x^3-17x^2+80x-64}\right)$

$\left(\frac{20}{63}x^2\right)\left(6b^3\right)$