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27*x-(x^5*y^2*((2*y^6)/3)) = 0
27*x+(-2/3)*x^5*y^8 = 0
27*x-2/3*x^5*y^8 = 0
x*(27-2/3*x^4*y^8) = 0
-2/3*x^4*y^8 = -27 // : -2/3*y^8
x^4 = 81/2*y^-8
x^4 = 81/2*y^-8 // ^ 1/4
abs(x) = (81/2)^(1/4)*y^-2
x = (81/2)^(1/4)*y^-2 or x = -((81/2)^(1/4)*y^-2)
x = 0
x = 0
x in { (81/2)^(1/4)*y^-2, -((81/2)^(1/4)*y^-2), 0 }
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