Here’s Homer in a Simpsons episode called ‘Mathlete’s Feat’ that aired in May 2015. It’s actually a pretty sophisticated mathematical joke we have going here. I suspect some people may recognize the π at the end (Greek letter pi, and for Homer it would be ‘pie’) .. but the other symbols are more hard-core math. So let me decode it. The square root of negative 1 is a mathematically imaginary number usually written as ‘i’. Two to the power of three is 2 x 2 x 2 which is eight. The Greek letter sigma is used to indicate ‘sum’ or ‘sum of’. And so : Homer says ‘I ate some pie and it was delicious’.