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to calculate the integral from (-infinty) to (+ infinity) of [x^2 / (x^4 + 4)[ dx...

to calculate the integral from (-infinty) to (+ infinity) of [x^2 / (x^4 + 4)[ dx .   poles, residues.

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Calculate the integral from (-infinty) to (+ infinity) of [x^2 / (x^4 + 4)[ dx
Calculate the integral from (-infinty) to (+ infinity) of [x^2 / (x^4 + 4)[ dx
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