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sqrt(((7+sqrt(17))/2)*(((7+sqrt(17))/2)-5)*(((7+sqrt(17))/2)-2)*(((7+sqrt(17))/2)-sqrt(17))
sqrt(((7+sqrt(17))/2)*(((7+sqrt(17))/2)-5)*(((7+sqrt(17))/2)-2)*(((7+sqrt(17))/2)-sqrt(17))
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