Welcome, vet.
If they are prickly types you need to handle them with gloves and maybe newspapers to separate. Dump the pot onto newspaper and using newspaper to protect from spines and things, carefully pull apart to separate tangled roots. Trying to do as little damage as possible. Give each plant their own pot with dampened, quick draining soil mix (usually contains quite a bit of sand). This should do you unless there is too much root tangling under there.
Good luck!