got a whole pile of equations. due to the way that DuPAL works, i usually get "extra" terms that aren't real. in this case, the highlighted terms appear in common with every single output term and are spurious. it's probably due to the table not being filled out completely--there are some output combinations that aren't possible.
i also like to use the DuPAL "Peeper" tool to manually toggle the pin states and confirm my equations. the newest version can also detect tristated outputs (yellow color code). quite handy!