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x in (-oo:+oo)
Y = (1/2)*G^6*x^2 // - (1/2)*G^6*x^2
Y-((1/2)*G^6*x^2) = 0
(-1/2)*G^6*x^2+Y = 0
-1/2*G^6*x^2 = -Y // : -1/2*G^6
x^2 = 2*G^-6*Y
x^2 = 2*G^-6*Y // ^ 1/2
abs(x) = 2^(1/2)*G^-3*Y^(1/2)
x = 2^(1/2)*G^-3*Y^(1/2) or x = -(2^(1/2)*G^-3*Y^(1/2))
x in { 2^(1/2)*G^-3*Y^(1/2), -(2^(1/2)*G^-3*Y^(1/2)) }
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