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x in (-oo:+oo)
1 = 4*x^7+((5-2)^2)/(7-4) // - 4*x^7+((5-2)^2)/(7-4)
1-(4*x^7)-(((5-2)^2)/(7-4)) = 0
1-4*x^7-(((5-2)^2)/(7-4)) = 0
-4*x^7 = 2 // : -4
x^7 = -1/2
x^7 = -1/2 // ^ 1/7
x = -(1/2)^(1/7)
x = -(1/2)^(1/7)
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