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x in (-oo:+oo)
12*x^7-(((16*x^3)/2)*x^3) = 0
12*x^7-8*x^6 = 0
12*x^7-8*x^6 = 0
4*x^6*(3*x-2) = 0
3*x-2 = 0 // + 2
3*x = 2 // : 3
x = 2/3
4*x^6 = 0
4*x^6 = 0 // : 4
x^6 = 0
x = 0
x in { 2/3, 0 }
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