I made a small online editor to help me format Casio BASIC programs with unicode symbols more easily: http://civmall.icu/fx.html
You type your code on the left side using standard keyboard symbols, and it will replace some of them with unicode symbols that look like those that exist in Casio calculators and put it on the rights side where you can copy it from.
The editor is made with fx-3650P II in mind because that's what I use these days. Any symbols that I am missing and that you want me to add just message me here or at the email on the webpage.