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\[\sqrt[3]{9+4\sqrt{5}}+\sqrt[3]{9-4\sqrt{5}}\]
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root(3,9+4sqrt(5))+root(3,9-4sqrt(5))
root(3,9+4sqrt(5)) + root(3,9-4sqrt(5))
\sqrt[3]{9+4\sqrt{5}}+\sqrt[3]{9-4\sqrt{5}}
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