$\lim_{x\to0}\left(\frac{x^k}{a^x}\right)$

$\frac{x^3-x^2-14x-24}{x+3}$

$\left(3^{n-3}-3^{n-2}\right)^2$

$\int\left(sex\left(x\right)\sqrt{1-cos\left(x\right)}\right)dx$

$\left(n^5\right)^4$

$2\left(3\right)^3-6\left(3\right)^2+3$

$\lim_{x\to7}\left(x^2+2x+4\right)$