$\left(x-9y+8z-4w\right)^2$

$x^2+x-110$

$\left(\frac{x+9}{x^2-9}\right)+\left(\frac{1}{x+1}\right)$

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

$\lim_{x\to0}\left(\frac{5x^2+\sin\left(7x\right)}{x}\right)$

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

$\sin\left(135\right)\cos\left(\frac{\pi}{3}\right)+\cos\left(135\right)+\sin\left(\frac{\pi}{3}\right)$