By the way, it’s quite easy to add your own REPL shortcuts, if there’s a particular character you need to type which isn’t in the REPL’s built-in tab completion dictionary:
For example, to have \power expand to ^:
using REPL
REPL.REPLCompletions.latex_symbols["\\power"] = "\u005e"
Put it in your ~/.julia/config/startup.jl file to run it every time you start a REPL.