神马作文网∫(-5,5)[(x^2*sinx)/(x^2+1)^2]dx
![∫(-5,5)[(x^2*sinx)/(x^2+1)^2]dx](/uploads/image/z/5490561-57-1.jpg?t=%E2%88%AB%28-5%2C5%29%5B%28x%5E2%2Asinx%29%2F%28x%5E2%2B1%29%5E2%5Ddx)
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