[BlindTlk] math notation questions

[Sarah Harris]

   Good evening. I am going to tutor a  middle school student in math. When I was a tutor at a community college, I used a Braille Sense u2. Now, I have a Windows computer, an iPhone, and a Focus 40 Blue fourth generation that is very close to the end of its days. I would appreciate recommendations if I should buy another device. Thank you. 
     Sarah  

Sent from my iPhone