1- Sendo A = {1,2,3,4,5}, B = {1,3,5,7,9} e C = {5,6,7,8,9,10}...

A ∩ B = { 1,3,5}

A ∪ B ∪ C = {1,2,3,4,5,6,7,8,9,10}

A ∩ B ∩ C =  {5}

A − B = { 2,4}

D − C =  {11,12,13}

CA B = {7,9}

C − D=  {5,6,7,8}

(A ∩ C) ∪ D = {5} ∪ D =  {5,9,10,11,12,13}

(C − B) ∩ D= {6,8,10} ∩ D =  {10}

A ∪ B ∪ C ∪ D = {1,2,3,4,5,6,7,8,9,10,11,12,13}

A ∩ B ∩ D= { 1,3,5}  ∩ D = vazio

(A ∪ D) ∩ (B ∪ C) = {1,2,3,4,5,9,10,11,12,13} ∩ {1,3,5,6,7,8,9,10}= {1,3,5,9,10}