That implies that Kirby can be used to increment all sorts of entertainment. What is "The Odd Couple" + Kirby? How about "Paula Deen" + Kirby? (I suppose I know the answer to that one already: "Paula Deen" + Kirby = Granny Goodness.)
But the other consequence of the math is: if we can somehow subtract "Adventure Time" from "Kamandi", it will bring Kirby back to life.
This was one of my favorite episodes. The whole premise is that they kill a flower they were supposed to be taking care of for their friend, so their FIRST thought is to go all Orpheus and retrieve the flower's soul from Hades.