Integral of $$$\frac{\operatorname{atan}{\left(\frac{x}{n} \right)}}{x \left(x^{2} + 1\right)}$$$ with respect to $$$x$$$
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Find $$$\int \frac{\operatorname{atan}{\left(\frac{x}{n} \right)}}{x \left(x^{2} + 1\right)}\, dx$$$.