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D( x )
2*u^5*y^2 = 0
2*u^5*y^2 = 0
2*u^5*y^2 = 0
2*u^5*y^2 = 0
x należy do R
x belongs to the empty set
(4*u^3*x^5-(2*u^2))/(2*u^5*y^2) = 0
x belongs to the empty set
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