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x in (-oo:+oo)
(3*x)/2-(2*(x/4)^7) = 0
(3*x)/2-2*(x/4)^7 = 0
3/2*x-1/8192*x^7 = 0
1/2*x*(3-1/4096*x^6) = 0
-1/4096*x^6 = -3 // : -1/4096
x^6 = 12288
x^6 = 12288 // ^ 1/6
abs(x) = 4*3^(1/6)
x = 4*3^(1/6) or x = -(4*3^(1/6))
x/2 = 0
1/2*x = 0 // : 1/2
x = 0
x in { 4*3^(1/6), -(4*3^(1/6)), 0 }
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