
<!DOCTYPE math
  PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<math xmlns="http://www.w3.org/1998/Math/MathML">
<mo> + </mo>
<mo> &amp;lt; </mo>
<mo> &amp;le; </mo>
<mo> &amp;lt;= </mo>
<mo> ++ </mo>
<mo> &amp;sum; </mo>
<mo> .NOT. </mo>
<mo> and </mo>
<mo> &amp;InvisibleTimes; </mo>
<mo mathvariant="bold"> + </mo>
</math>