Union
$$A \cup B =$$
{ brainstem, cerebellum, cerebrum, familial, friendly, playful, practical, self-loving, sexual, universal }
Symmetric Difference
$$A \ominus B =$$
{ brainstem, cerebellum, cerebrum, familial, friendly, playful, practical, self-loving, sexual, universal }
Difference
$$A - B =$$
{ familial, friendly, playful, practical, self-loving, sexual, universal }
Cartesian Product
$$A \times B =$$
{ (familial, brainstem),
(familial, cerebellum),
(familial, cerebrum),
(friendly, brainstem),
(friendly, cerebellum),
(friendly, cerebrum),
(playful, brainstem),
(playful, cerebellum),
(playful, cerebrum),
(practical, brainstem),
(practical, cerebellum),
(practical, cerebrum),
(self-loving, brainstem),
(self-loving, cerebellum),
(self-loving, cerebrum),
(sexual, brainstem),
(sexual, cerebellum),
(sexual, cerebrum),
(universal, brainstem),
(universal, cerebellum),
(universal, cerebrum) }