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((1/2*(1+5^1/2))^1/3-(2/(1+5^1/2))^1/3)^3+3*((1/2*(1+5^1/2))^1/3-(2/(1+5^1/2))^1/3)
((1/2*(1+5^1/2))^1/3-(2/(1+5^1/2))^1/3)^3+3*((1/2*(1+5^1/2))^1/3-(2/(1+5^1/2))^1/3)
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