[BlindMath] Reading an ascii math formula in nvda

[pranav.lal at gmail.com]

Hi all,

I need to read the following formula written in ascii math with nvda. I see
that math player is not an option. I am not as familiar as I should be with
ascii math notation.
E_d = \sqrt{\frac{\sum_{t=1}^{N}(R_{b,t} - R_{x,t})}{N-1}}


For instance, what does \sum_{t=1}  mean? What is being added? 

I am using the add-on called access8Math.

I went to http://asciimath.org/  and rendered the above formula. The math
content is being displayed but I am unable to navigate amongst different
parts of the expression. NVDA is reading  the entire expression as a block
of text. 

It may be easier for me to just read the above formula as is, so could
someone translate it into plain English perhaps?

Note:
I am doing a course relating to finance which is where the above formula is
being used.  The people have not had a blind student before and are happy to
help in whatever way they scan.

I am using NVDA version 2021.2. 
Firefox version = 94.0.1 (64-bit)
Windows version = 21H2 (OS Build 22000.318) 

I tried the formula in google chrome. I can hear the rendering too but it
sounds different than it does in firefox. Hitting enter on the clickable
expression does nothing and I cannot interact with the expression in parts
to understand it.
Google chrome Version 96.0.4664.45 (Official Build) (64-bit)
Pranav