<!DOCTYPE html>
<html>
<head>
  <title>op-dict mo form</title>
  <link rel="mismatch" href="op-dict-1-notref.html">
</head>
<body>
  <math>
    <mrow>
      <mo form="infix">+</mo>
      <mn>1</mn>
    </mrow>
  </math>
</body>
</html>
