(1 %2B 1%2F(4 sqrt 3))%2F2 * minimum((1 %2F sqrt 3)*(%7Cx%7C%2B%7Cy%7C%2B%7Cz%7C)%2C max (%7Cx%7C%2C %7Cy%7C%2C %7Cz%7C))

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