Hi @kelvenluiz
We're glad you're here. When you get a chance, please introduce yourself on this forum thread.
What about something like this:
(count-selected(.)=1 and (selected(.,'5') or selected(.,'6')))
or
(count-selected(.)>0 and not(selected(.,'5')) and not(selected(.,'6')))
you need to update your values because I used numbers 1-6.