Calculate ∫0∞dx(x2+9)2\int_{0}^{\infty} \frac{dx}{(x^2+9)^2}∫0∞(x2+9)2dx.
π/108\pi/108π/108
π/54\pi/54π/54
π/36\pi/36π/36
π/18\pi/18π/18