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D( x )
12*v^4*w^3 = 0
12*v^4*w^3 = 0
12*v^4*w^3 = 0
12*v^4*w^3 = 0
x należy do R
x belongs to the empty set
(8*v^2-(4*u^3*v))/(12*v^4*w^3) = 0
x belongs to the empty set
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