Union
$$A \cup B =$$
{ disease, earthquake, equality, fire, flood, fraternity, hurricane, liberty, lightning, meteor, volcano }
Symmetric Difference
$$A \ominus B =$$
{ disease, earthquake, equality, fire, flood, fraternity, hurricane, liberty, lightning, meteor, volcano }
Difference
$$B - A =$$
{ disease, earthquake, fire, flood, hurricane, lightning, meteor, volcano }
Cartesian Product
$$A \times B =$$
{ (equality, disease),
(equality, earthquake),
(equality, fire),
(equality, flood),
(equality, hurricane),
(equality, lightning),
(equality, meteor),
(equality, volcano),
(fraternity, disease),
(fraternity, earthquake),
(fraternity, fire),
(fraternity, flood),
(fraternity, hurricane),
(fraternity, lightning),
(fraternity, meteor),
(fraternity, volcano),
(liberty, disease),
(liberty, earthquake),
(liberty, fire),
(liberty, flood),
(liberty, hurricane),
(liberty, lightning),
(liberty, meteor),
(liberty, volcano) }
Liberté, égalité, fraternité