\( \int_{-\pi / 4}^{\pi / 4} \frac{e^{x}(x \sin x)}{e^{2 x}-1} d x ...

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\( \int_{-\pi / 4}^{\pi / 4} \frac{e^{x}(x \sin x)}{e^{2 x}-1} d x \) is equal to
\( \mathrm{P} \)
(A) 0
(B) 2
W
(C) e
(D) none of these
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