If x=sqrt[3]a+sqrta2+b3+sqrt[3]a−sqrta2+b3x = \\sqrt[3]{a + \\sqrt{a^2 + b^3}} + \\sqrt[3]{a - \\sqrt{a^2 + b^3}}x=sqrt[3]a+sqrta2+b3+sqrt[3]a−sqrta2+b3, then x3+3bx=x^3 + 3bx = x3+3bx=
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