i found tail at the very bottom
This probably means that something you had planned to turn out well, ended up going against you. The scenario flipped it's self around and you were so said "betrayed" by your own plan or game.
Assuming the author is the speaker is the best option. Also, reading the peom out loud is another strategy.
here's your answer but u can add some more words in it or u can remove some words
I believe the answer is 67 + 23 divided by 4 which is 0