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x in (-oo:+oo)
x^(2/5) = 22 // - 22
x^(2/5)-22 = 0
1*x^(2/5) = 22 // : 1
x^(2/5) = 22
x^(2/5) = 22 // ^ 5
x^2 = 5153632 // ^ 1/2
abs(x) = 484*22^(1/2)
x = 484*22^(1/2) or x = -(484*22^(1/2))
x in { 484*22^(1/2), -(484*22^(1/2)) }
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