Custom Math Formula not on output

I’ve to write some simple math equation but it will not appear in output on the monitor, i did as written in How to Create a Custom Math Formula - Adalo Resources but nothing changed.
Can someone help me?

Hi @toscatommaso ,

Welcome.

Can you give example ?

A walkthrough with some context would be good.

Hello, can you please share an image of the formula that you have implemented?

Thank you!