Questions about Elementary Math

Hello,


I have two questions regarding elementary math as specified by MathML 3.0:


1) Is there a renderer out there that supports rendering additions, substractions, multiplications, and divisions with <mstack>, <mscarries>, and <mlongdiv> ? I failed to find one so far (downgrading IE to IE9 + installing a plugin isn't really future proof).


2) Despite being XML, <mstack> relies on children order instead of named elements like <dividend>, <divisor>, <quotient>. What's the rationale behind this choice?


Thanks you,

Gregory