Equality
$$A \neq B$$
A is not equal to B
Subset
$$A \not\subseteq B$$
A is not a subset of or equal to B
Superset
$$A \not\supseteq B$$
A is not a superset of or equal to B
Intersection
$$A \cap B =$$
{ }
Union
$$A \cup B =$$
{ Formal, Natural, Social, climax, exposition, fall, resolution, rise }
Symmetric Difference
$$A \ominus B =$$
{ Formal, Natural, Social, climax, exposition, fall, resolution, rise }
Difference
$$A - B =$$
{ Formal, Natural, Social }
Difference
$$B - A =$$
{ climax, exposition, fall, resolution, rise }
Cartesian Product
$$A \times B =$$
{ (Formal, climax),
(Formal, exposition),
(Formal, fall),
(Formal, resolution),
(Formal, rise),
(Natural, climax),
(Natural, exposition),
(Natural, fall),
(Natural, resolution),
(Natural, rise),
(Social, climax),
(Social, exposition),
(Social, fall),
(Social, resolution),
(Social, rise) }