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D( x )
(((-512*y^3)/4)/(y^3))*z^9 = 0
y^3 = 0
(((-512*y^3)/4)/(y^3))*z^9 = 0
(((-512*y^3)/4)/(y^3))*z^9 = 0
-128*z^9 = 0
x naleu017Cy do R
y^3 = 0
y^3 = 0
y^3 = 0
x naleu017Cy do R
x belongs to the empty set
(((((-512*y^3)/4)/(y^3))*z^9)^-1)/3 = 0
x belongs to the empty set
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