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pls-find-cos-x-1-x-4-dx-

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Question Number 180046 by srikanth2684 last updated on 06/Nov/22
pls find ∫_(−∞) ^∞ ((cos x)/((1+x^4 )))dx
$${pls}\:{find}\: \\ $$$$\underset{−\infty} {\overset{\infty} {\int}}\frac{{cos}\:{x}}{\left(\mathrm{1}+{x}^{\mathrm{4}} \right)}{dx} \\ $$

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