Oh, my eyes, my eyes! People still can solve this kind of cryptography? Mathematicians should love this one!

Files given:

• Symbols.png

Looking at the image, it looks like some latex output:

and we can copy out the latex as

\Cap\Cap\Theta\Finv\\{\Pi\ltimes\aleph y\_\wp\infty\therefore\heartsuit\_\Lsh\aleph\Theta\eth\Xi\\}

and read off the flag