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D( x )
3*t^2 = 0
9*t^4 = 0
s^3 = 0
3*t^2 = 0
3*t^2 = 0
3*t^2 = 0
x należy do R
9*t^4 = 0
9*t^4 = 0
9*t^4 = 0
x należy do R
s^3 = 0
s^3 = 0
s^3 = 0
x należy do R
x belongs to the empty set
(((s^5)/(3*t^2))/(s^3))/(9*t^4) = 0
x belongs to the empty set
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