$\lim_{x\to0}\left(\frac{x^3-8}{x^3+x^2+4}\right)$

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

$-\frac{3}{2}x^5x\left(\frac{4}{6}x^6-\frac{1}{9}x-\frac{4}{3}\right)$

$f\left(x\right)=\left(x-7\right)^2\left(x^2+7\right)$

$\int\frac{12}{9x^2+4}dx$

$\left(\frac{2}{3}x+\frac{1}{2}\right)^3$

$\int-8\sqrt{1-x}dx$