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integral 0.49592 to 0.74142 (r^2/(r^3+0.8) * (0.2 sin(11r^3+1.8))/(11r^3+1.8))dr
integral 0.49592 to 0.74142 (r^2/(r^3+0.8) * (0.2 sin(11r^3+1.8))/(11r^3+1.8))dr
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