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

$\lim_{n\to\infty}\left|\frac{5n\left(x-6\right)}{n+1}\right|$

$105-\left(-23+12\right)$

$a^3+3\left(a\right)^2\left(3\right)+3\left(a\right)\left(3\right)^2-\left(3\right)^3$

$2x^4-x^3-3+7\:\:$

$\sqrt{7}+\sqrt{7}$

$\int\frac{x^2+2x+3}{x^3-3x^2+9x}dx$