I'm pretty sure the equation for 24 has the wrong symbol. Try using a different symbol for the first part.
It's the 3 ^ 3 - 3 one I think.
I posted a let's play on my other channel that may help you solve the puzzles :)!
Shiz, looks like I did the math wrong on my phone's calculator... Wait... how would I input 3 ^ 3 - 3 on a calculator?
Actually it looks like my math was wrong whoops 😅 Updated it!
(._.)
Angery