Union
$$A \cup B =$$
{ Anthropology, Economics, Geography, Political science, Psychology, Sociology, angry, bored, happy, peaceful }
Symmetric Difference
$$A \ominus B =$$
{ Anthropology, Economics, Geography, Political science, Psychology, Sociology, angry, bored, happy, peaceful }
Difference
$$A - B =$$
{ Anthropology, Economics, Geography, Political science, Psychology, Sociology }
Cartesian Product
$$A \times B =$$
{ (Anthropology, angry),
(Anthropology, bored),
(Anthropology, happy),
(Anthropology, peaceful),
(Economics, angry),
(Economics, bored),
(Economics, happy),
(Economics, peaceful),
(Geography, angry),
(Geography, bored),
(Geography, happy),
(Geography, peaceful),
(Political science, angry),
(Political science, bored),
(Political science, happy),
(Political science, peaceful),
(Psychology, angry),
(Psychology, bored),
(Psychology, happy),
(Psychology, peaceful),
(Sociology, angry),
(Sociology, bored),
(Sociology, happy),
(Sociology, peaceful) }