Xviewer 1.70 Math Issue
Normally, for the math expression 'Mn' (when n<m),
'Mn' can be written in (nested) the expression of 'Mm'.
This is a daisy-chain of math expressions.
For Ver 1.64: M1(Math1) can be written in the expression of Math2.
But, for Ver 1.70: M1 can not be written in the expression of Mathe2. An error occurs.
Solution: Please update to latest version of Xviwer.