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[quad 4|x(c),int(2x(1+sin x))/(1+cos^(2)...

[quad 4|x_(c),int(2x(1+sin x))/(1+cos^(2)x)=],[(pi)/(4)|x_(c)quad (1)pi^(2)quad quad (2)pi^(2)/4quad " IAIEEE-200"]

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