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(1+(2/(sqrt((7-sqrt(5))/(2sqrt(5)))-1)))^(1/3)+(1-(2/(sqrt((7-sqrt(5))/(2sqrt(5)))+1)))^(1/3)
(1+(2/(sqrt((7-sqrt(5))/(2sqrt(5)))-1)))^(1/3)+(1-(2/(sqrt((7-sqrt(5))/(2sqrt(5)))+1)))^(1/3)
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