Let’s see …
8 + 5 = 13
8 - 5 = 3
8 X 5 = 40
8 / 5 = 1.6
None of the above are correct, so feel free to choose whichever one catches your fancy.
[JEDIT]
Also, you’re allowing the contents of Homer’s mouth to distract you from his hilariously distended facial features.