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X in (-oo:+oo)
(X^2-(7/3))^3 = 0
(X^2-7/3)^3 = 0
1*X^2 = 7/3 // : 1
X^2 = 7/3
X^2 = 7/3 // ^ 1/2
abs(X) = (7/3)^(1/2)
X = (7/3)^(1/2) or X = -(7/3)^(1/2)
X in { (7/3)^(1/2), -(7/3)^(1/2), (7/3)^(1/2), -(7/3)^(1/2), (7/3)^(1/2), -(7/3)^(1/2) }
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