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14-((12/2)*x^6) = 0
14-6*x^6 = 0
-6*x^6 = -14 // : -6
x^6 = 7/3
x^6 = 7/3 // ^ 1/6
abs(x) = (7/3)^(1/6)
x = (7/3)^(1/6) or x = -(7/3)^(1/6)
x in { (7/3)^(1/6), -(7/3)^(1/6) }
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