The editor has the title and tooltip "LaTeX". This is not entirely correct. It's just the math environment subset for LaTeX that we can handle and support.
The label also conflicts with the visual symbol, which clearly communicates the Math function using the sum symbol. Remember that many people might not even know what LaTeX even is, causing further confusion.
The problem here is that we want to explain to the user that we want him to enter the math using LaTeX, because otherwise he might not understand how to enter his formula. Perhaps that is why the LaTeX label was chosen.
We should find a better way. Perhaps using a label or placeholder. "Enter formula using AMS-LaTeX"