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D( x )
m^-10 = 0
m^8*n = 0
m^-10 = 0
m^-10 = 0
m^-10 = 0
x należy do R
m^8*n = 0
m^8*n = 0
m^8*n = 0
x należy do R
x belongs to the empty set
(((m^8*n)^-2)/(m^-10))*n^3 = 0
x belongs to the empty set
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