$\frac{\left(\left(-1^n\left(x+7\right)^n\right)\right)}{\left(4^{n+1}\right)}$

$\lim_{x\to\infty}\left(\frac{e^x}{\sqrt{2x+5}}\right)$

$\int\frac{x^2-16x-13}{\left(x-1\right)^2\left(x^2+1\right)}dx$

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

$\frac{52sin45}{sin59}$

$\left(o+x\right)^3$

$sec=-\frac{11}{6}$