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integrate (1/2+2/pi(sin x + 1/3*sin(3x) + 1/5*sin(5x) +1/7*sin(7x))), x=0..pi
integrate (1/2+2/pi(sin x + 1/3*sin(3x) + 1/5*sin(5x) +1/7*sin(7x))), x=0..pi
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