Evaluate: `int(log x)/xdx`

Explanation

To evaluate the integral \(\int \frac{\log x}{x} \, dx\), we can follow these steps:

### Step 1: Substitution
Let \( t = \log x \). Then, the differential \( dt \) can be found as follows:
\[ dt = \frac{1}{x} \, dx \quad \Rightarrow \quad dx = x \, dt = e^t \, dt \]
since \( x = e^t \) when \( t = \log x \).
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