data/pom/89.xml
<?xml version="1.0" ?>
<math type="pom-exported">
<expression prime-tag="sequence">
<term prime-tag="latex-command">\sigma</term>
<expression prime-tag="caret" secondary-tags="superscript_operation">
<term prime-tag="digit" secondary-tags="numeric">2</term>
</expression>
<term prime-tag="equals">=</term>
<term prime-tag="letter" secondary-tags="Latin">X</term>
<expression>
<expression prime-tag="caret" secondary-tags="superscript_operation">
<term prime-tag="letter" secondary-tags="Latin">T</term>
</expression>
</expression>
</expression>
</math>