Union
$$A \cup B =$$
{ distress, eustress, exploitative, hoarding, hyperstress, hypostress, marketing, productive, receptive }
Symmetric Difference
$$A \ominus B =$$
{ distress, eustress, exploitative, hoarding, hyperstress, hypostress, marketing, productive, receptive }
Difference
$$A - B =$$
{ distress, eustress, hyperstress, hypostress }
Difference
$$B - A =$$
{ exploitative, hoarding, marketing, productive, receptive }
Cartesian Product
$$A \times B =$$
{ (distress, exploitative),
(distress, hoarding),
(distress, marketing),
(distress, productive),
(distress, receptive),
(eustress, exploitative),
(eustress, hoarding),
(eustress, marketing),
(eustress, productive),
(eustress, receptive),
(hyperstress, exploitative),
(hyperstress, hoarding),
(hyperstress, marketing),
(hyperstress, productive),
(hyperstress, receptive),
(hypostress, exploitative),
(hypostress, hoarding),
(hypostress, marketing),
(hypostress, productive),
(hypostress, receptive) }
Erich Fromm