$\lim_{x\to-1}\left(\frac{\left(8x^4+7x^3+6x+5\right)}{x+1}\right)$

$3^{-6}\cdot3^9$

$sec^2x=4$

$\frac{dy}{dx}=\frac{y-1}{2x+5}$

$\lim_{x\to0}\left(\frac{1-\cos\left(x\right)}{2sin\left(x\right)}\right)$

$\frac{\left(xy^2\right)^3}{\left(x^{-3}y^2\right)^2}$

$10 x ^ { 4 } + 120 x ^ { 3 } + 570 x ^ { 2 } + 950 x + 500$