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D( x )
8*u^4*w^4 = 0
8*u^4*w^4 = 0
8*u^4*w^4 = 0
8*u^4*w^4 = 0
x należy do R
x belongs to the empty set
(12*w^2*y^6-(16*w))/(8*u^4*w^4) = 0
x belongs to the empty set
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