This shortcut is like latex and saves a lot of time. Now create symbolic variables with multiple accents. The project page and the CTAN.
Open an example in Overleaf.
To add an equation to a document just tap at the top right of a document and select Equation. Not familiar with that utility. Its a common problem with actuarial symbol and it help align the sub and superscript. TeX - LaTeX Stack Exchange is a question and answer site for users of TeX LaTeX ConTeXt and related typesetting systems.