Oh, my eyes, my eyes! People still can solve this kind of cryptography? Mathematicians should love this one!
Files given:
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\\}
\[\Cap\Cap\Theta\Finv\{\Pi\ltimes\aleph y_\wp\infty\therefore\heartsuit_\Lsh\aleph\Theta\eth\Xi\}\] and read off the flag
Flag:
CCTF{Play_with_LaTeX}