miSmathsize16.test

<<< mml
<?xml version="1.0" encoding="UTF-8"?>

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <mi mathsize="2em">A</mi> 
  <mo>+</mo> 
  <mi>B</mi> </math>
>>> native
[ EIdentifier "A" , ESymbol Bin "+" , EIdentifier "B" ]