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D( x )
-4*u^2*z^5 = 0
-4*u^2*z^5 = 0
-4*u^2*z^5 = 0
-4*u^2*z^5 = 0
x należy do R
x belongs to the empty set
(35*u^6*z^6-(24*u^6*z^4))/(-4*u^2*z^5) = 0
x belongs to the empty set
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