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x in (-oo:+oo)
X = 4*(((((3*4)/5)/2)*x^10)/6)^2 // - 4*(((((3*4)/5)/2)*x^10)/6)^2
X-(4*(((((3*4)/5)/2)*x^10)/6)^2) = 0
X-4*(((((3*4)/5)/2)*x^10)/6)^2 = 0
-4/25*x^20 = -X // : -4/25
x^20 = 25/4*X
x^20 = 25/4*X // ^ 1/20
abs(x) = (25/4)^(1/20)*X^(1/20)
x = (25/4)^(1/20)*X^(1/20) or x = -((25/4)^(1/20)*X^(1/20))
x in { (25/4)^(1/20)*X^(1/20), -((25/4)^(1/20)*X^(1/20)) }
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