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D( x )
y^-1 = 0
y^-1 = 0
y^-1 = 0
y^-1 = 0
x naleu017Cy do R
x belongs to the empty set
x^11*((x^3)/(y^-1))*((x^2*((-x)^3+18*x^2-(108*x^2)+216))/5) = 0
x belongs to the empty set
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