1,evaluate integral -pi to pi cos^2 x/ 1+ a^x 2, Evaluate 1/3 sin^2x+ 7 sin X cos X +2 cos ^2 x
1,evaluate integral -pi to pi cos^2 x/ 1+ a^x
2, Evaluate 1/3 sin^2x+ 7 sin X cos X +2 cos ^2 x

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