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
$$A \cup B =$$
{ metaphysical, positivity, preview, question, read, summarize, test, theological }
Symmetric Difference
$$A \ominus B =$$
{ metaphysical, positivity, preview, question, read, summarize, test, theological }
Difference
$$A - B =$$
{ metaphysical, positivity, theological }
Difference
$$B - A =$$
{ preview, question, read, summarize, test }
Cartesian Product
$$A \times B =$$
{ (metaphysical, preview),
(metaphysical, question),
(metaphysical, read),
(metaphysical, summarize),
(metaphysical, test),
(positivity, preview),
(positivity, question),
(positivity, read),
(positivity, summarize),
(positivity, test),
(theological, preview),
(theological, question),
(theological, read),
(theological, summarize),
(theological, test) }
Law of three stages