Does This Succumb To Standard Techniques?

Calculus Level 3

\[ \large \int_{- \infty} ^ \infty \frac { e^{2x} - e^x } { x ( e^{2x}+1)( e^x+1) } \, dx \]

The integral above has a closed form. Find this closed form.

Give your answer to 3 decimal places.

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