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x in (-oo:+oo)
55/75 = x^100 // - x^100
55/75-x^100 = 0
-1*x^100 = -11/15 // : -1
x^100 = 11/15
x^100 = 11/15 // ^ 1/100
abs(x) = (11/15)^(1/100)
x = (11/15)^(1/100) or x = -(11/15)^(1/100)
x in { (11/15)^(1/100), -(11/15)^(1/100) }
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