An Emacs minor mode for inputting math symbols and Unicode symbols.
Home Page: http://xahlee.info/emacs/emacs/xmsi-math-symbols-input.html
Install using straight.el:
(use-package xah-math-input
:straight
( :repo "diamondbond/xah-math-input"
:host github
:type git
:files ("xah-math-input.el")))