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x in (-oo:+oo)
x^1*((8*x^2*y^5)/2)*y^2+4*x^1*y^3 = 0
x*((8*x^2*y^5)/2)*y^2+4*x*y^3 = 0
4*x^3*y^7+4*x*y^3 = 0
4*x*y^3*(x^2*y^4+1) = 0
x^2*y^4 = -1 // : y^4
x^2 = -1/(y^4)
x^2 = -1/(y^4) // ^ 1/2
abs(x) = ((-1)^(1/2))/(y^2)
x = ((-1)^(1/2))/(y^2) or x = -(((-1)^(1/2))/(y^2))
4*x*y^3 = 0
4*x*y^3 = 0 // : 4*y^3
x = 0
x in { ((-1)^(1/2))/(y^2), -(((-1)^(1/2))/(y^2)), 0 }
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