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((4*a^3)/3)*b^4 = 0
((4*a^3)/3)*b^4 = 0
((4*a^3)/3)*b^4 = 0
4/3*a^3*b^4 = 0
x należy do R
x belongs to the empty set
(((4*a^3)/3)*b^4)^-2 = 0
x belongs to the empty set
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