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2 / (3 * (5 + 1)^0.5) - 2 / (3 * (5 - 1)^0.5)
1) (5 + 1)^0.5 = 2.45
2) 3 * 2.45 = 7.22
3) 2 / 7.22 = 0.28
4) (5 - 1)^0.5 = 2
5) 3 * 2 = 6
6) 2 / 6 = 0.33(3)
7) 0.28 - 0.33 = -0.05

2 / (3 * (5 + 1)^0.5) - 2 / (3 * (5 - 1)^0.5) = -0.05