Question Number 124409 by oustmuchiya@gmail.com last updated on 03/Dec/20
$${write}\:\mathrm{A}'\cup\:{B}'\:{in}\:{a}\:{disjoint}\:{set} \\ $$
Answered by Ar Brandon last updated on 03/Dec/20
$$\left(\mathrm{A}\cup\mathrm{B}\right)−\left(\mathrm{A}\cap\mathrm{B}\right) \\ $$