The prime reason to use Nemeth Braille for math.

Nemeth UEB Comparison - Susan A Osterhaus (Math TSVI for TSBVI)

This is an excellent presentation for understanding the importance of teaching Nemeth vs. UEB for students that use braille.  It is a little over an hour.  If you adjust the playback speed 1.5 to 2.0 you can watch it in 30-45 mins.  It is well done and worth your time.