$\int_{\ln\left(8\right)}^{\ln\left(20\right)}\frac{4e^{-x}}{\sqrt{1-16e^{-2x}}}dx$

$\int_9^4\left(\frac{x^2}{x+1}\right)dx$

$\int_e^{\infty}\left(\frac{1}{x\left(\ln\left(x\right)\right)^3}\right)dx$

$\int_2^{\infty}\left(\frac{lnx}{x}\right)dx$

$\int_0^1\left(\ln\left(1+x\right)\right)dx$

$\int_1^{25}\frac{\left(\left(lnx\right)^5\right)}{4x}dx$

$\int_2^3\frac{1}{\sqrt{x-1}}dx$

$\int x\left(x^2-3\right)dx$