$\int\frac{x+2}{x^3-16x}dx$

$\ln\left(x^2-x-12\right)-\ln\left(2x+6\right)=\ln\left(0.5\right)$

$\int e^{2x-15}dx$

$\int\left(\frac{e-\sqrt{x+1}}{2\sqrt{x+1}}\right)dx$

$\frac{5^5}{5^2}$

$\left(\frac{5}{6}b^2-\frac{1}{5}\right)^2$

$sen\left(\frac{22.6}{84.1}\right)$