5.5 The Substitution Rule/69

${\begin{aligned}\int _{e}^{e^{4}}\left({\frac {dx}{x{\sqrt {\ln(x)}}}}\right)&=\int _{e}^{e^{4}}\left({\frac {1}{x}}/frac{1}{{\sqrt {(}}\ln(x))}\right)dx\end{aligned}}$