[BlindMath] Reading an ascii math formula in nvda

[prayner at unimelb.edu.au]

Is ascii math  the same as LATeX? This looks like standard LATeX to
me.  Interpretation below
Pranav Lal via BlindMath writes:
>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? 
You have two objects R_b and R_x. Probably they're two different types
of the thing R (whatever that might be in this context). The R things
have values at t=1, t=2 ... t=N. t is commonly time but that doesn't
matter here. For each of those values of t you take the difference
between the R_b thing and the R_x thing at that value of t. Then you
add up all N of them, that's what the \sum_{t=1}^N means. Then you
divide that sum by N-1 and finally take the square root.
cheers
Peter
>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
>
>
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Peter Rayner (he/him), Level 1, 187 Grattan St.
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I acknowledge the Traditional Custodians of the land on which I work, the Wurundjeri people of the Kulin nation, and pay my respect to their Elders, past and present