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2pi * Integrate[y * y^(1/3), {y,0,8}] = pi * Integrate[8^2-(x^3)^2, {x,0,2}]
2pi * Integrate[y * y^(1/3), {y,0,8}] = pi * Integrate[8^2-(x^3)^2, {x,0,2}]
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