<?xml version='1.0' ?>
<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
  <mrow>
    <mtext mathvariant="normal">“a”</mtext>
    <mo>+</mo>
    <mtext mathvariant="normal">“b”</mtext>
    <mo>+</mo>
    <mtext mathvariant="normal">“c”</mtext>
    <mo>+</mo>
    <mtext mathvariant="normal">“f”</mtext>
    <mo>+</mo>
    <mtext mathvariant="normal">“Γ”</mtext>
    <mo>+</mo>
    <mtext mathvariant="normal">“d”</mtext>
  </mrow>
</math>
