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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
x^-3*((2*x^-34*x^2*y^55)/3)*y^47 = 0
2/3*x^-35*y^102 = 0 // : 2/3*y^102
x^-35 = 0
x należy do O
x belongs to the empty set
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