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(10-(x^2)-(y^2))^0.5+(30-(x^2)-(y^2))^0.5+(1000-(x^2)-(y^2))^0.5
(10-(x^2)-(y^2))^0.5+(30-(x^2)-(y^2))^0.5+(1000-(x^2)-(y^2))^0.5
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