How to compute $\int_{0}^{1}\frac{x\arctan x}{1+(x+\frac{1}{x})\arctan x}dx$

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I want to calculate the following integral $$\int_{0}^{1}\frac{x\arctan x}{1+(x+\frac{1}{x})\arctan x} \, dx$$

But I have no way to do it, can someone help me, thank you.

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Through the Shafer-Fink inequality

$$ I\geq \int_{0}^{1}\frac{x^2}{\frac{1+2\sqrt{1+x^2}}{3}+x^2+1}\,dx = 0.122039\ldots$$ $$ I\leq \int_{0}^{1}\frac{x^2}{\frac{1+2\sqrt{1+x^2}}{\pi}+x^2+1}\,dx = 0.124451\ldots$$ but I do not see any particular reason for expecting a nice closed form.