zapisz w postaci sumy algebraicznej i zredukuj wyrazy podobne:
6a^3 -3a^2*b -a^3*b +ab^2 +b +3a^2*b -6ab=
=6a^3 -a^3*b +ab^2 -6ab +b
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6a^3 -3a^2*b -a^3*b +ab^2 +b +3a^2*b -6ab=
=6a^3 -a^3*b +ab^2 -6ab +b