data/pom/39.xml
<?xml version="1.0" ?>
<math type="pom-exported">
<expression prime-tag="sequence">
<term prime-tag="left parenthesis" secondary-tags="opening delimiter">(</term>
<term prime-tag="letter" secondary-tags="Latin">x</term>
<term prime-tag="plus">+</term>
<term prime-tag="letter" secondary-tags="Latin">y</term>
<term prime-tag="right parenthesis" secondary-tags="closing delimiter">)</term>
<expression prime-tag="caret" secondary-tags="superscript_operation">
<term prime-tag="letter" secondary-tags="Latin">n</term>
</expression>
<term prime-tag="equals">=</term>
<term prime-tag="operator">\sum</term>
<expression prime-tag="subsuperscript">
<expression prime-tag="underscore" secondary-tags="subscript_operation">
<expression prime-tag="sequence" secondary-tags="subscript">
<term prime-tag="letter" secondary-tags="Latin">k</term>
<term prime-tag="equals">=</term>
<term prime-tag="digit" secondary-tags="numeric">0</term>
</expression>
</expression>
<expression prime-tag="caret" secondary-tags="superscript_operation">
<term prime-tag="letter" secondary-tags="Latin">n</term>
</expression>
</expression>
<expression prime-tag="sequence">
<term prime-tag="letter" secondary-tags="Latin">n</term>
<term prime-tag="latex-command">\choose</term>
<term prime-tag="letter" secondary-tags="Latin">k</term>
</expression>
<term prime-tag="letter" secondary-tags="Latin">x</term>
<expression prime-tag="caret" secondary-tags="superscript_operation">
<expression prime-tag="sequence" secondary-tags="superscript">
<term prime-tag="letter" secondary-tags="Latin">n</term>
<term prime-tag="minus">-</term>
<term prime-tag="letter" secondary-tags="Latin">k</term>
</expression>
</expression>
<term prime-tag="letter" secondary-tags="Latin">y</term>
<expression prime-tag="caret" secondary-tags="superscript_operation">
<term prime-tag="letter" secondary-tags="Latin">k</term>
</expression>
<term prime-tag="equals">=</term>
<term prime-tag="operator">\sum</term>
<expression prime-tag="subsuperscript">
<expression prime-tag="underscore" secondary-tags="subscript_operation">
<expression prime-tag="sequence" secondary-tags="subscript">
<term prime-tag="letter" secondary-tags="Latin">k</term>
<term prime-tag="equals">=</term>
<term prime-tag="digit" secondary-tags="numeric">0</term>
</expression>
</expression>
<expression prime-tag="caret" secondary-tags="superscript_operation">
<term prime-tag="letter" secondary-tags="Latin">n</term>
</expression>
</expression>
<expression prime-tag="sequence">
<term prime-tag="letter" secondary-tags="Latin">n</term>
<term prime-tag="latex-command">\choose</term>
<term prime-tag="letter" secondary-tags="Latin">k</term>
</expression>
<term prime-tag="letter" secondary-tags="Latin">x</term>
<expression prime-tag="caret" secondary-tags="superscript_operation">
<term prime-tag="letter" secondary-tags="Latin">k</term>
</expression>
<term prime-tag="letter" secondary-tags="Latin">y</term>
<expression prime-tag="caret" secondary-tags="superscript_operation">
<expression prime-tag="sequence" secondary-tags="superscript">
<term prime-tag="letter" secondary-tags="Latin">n</term>
<term prime-tag="minus">-</term>
<term prime-tag="letter" secondary-tags="Latin">k</term>
</expression>
</expression>
</expression>
</math>