As the title says, how can I end up with cells that don't match in value, the difference/complement (set theory)?
I would prefer it with only FUNCTIONS and no script.
{1,2,3,4}\{1,3} = {2, 4}
or with letters
{a,b,c,d}\{a,c} = {b, d}
or with with space.
{xyz zyx, abc cba, qwe ewq}\{xyz zyx, qwe ewq} = {abc cba}