"it's somewhere I haven't been before" "The shower"

Fun fact: 1782¹² + 1841¹² = 1922¹² is an incorrect equation, per Fermat's last theorem.

They put that equation there because some of the writers of the episode have a mathematical background, and they knew it was wrong, but the error is so relatively small that if someone writes that in a normal calculator they'll get the equality. So basically an easter egg for someone that knows about Fermat's last theorem.