(2 * (1 * 0.5 + 3.5 * 3) - (1 + 3.5) * (0.5 + 3)) / (sqrt(2 * (1^2 + 3.5^2) - (1 + 3.5)^2) * sqrt(2 * (0.5^2 + 3^2) - (0.5 + 3)^2))

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