Answer
$\frac{1}{2} (\ln|\ln x|)^2+c $
Work Step by Step
Let $ u=\ln|\ln x|$, then $ du= \frac{1}{x\ln x} dx $ and hence
$$\int \frac{\ln|\ln x|}{ x\ln x}dx = \int udu\\
=\frac{1}{2} u^2+c
=\frac{1}{2} (\ln|\ln x|)^2+c.$$
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