<?xml version="1.0" encoding="UTF-8"?>

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <mrow>
    <ms>dog</ms> 
    <mo>+</mo> 
    <ms fontweight="bold">cat</ms> 
    <mo>+</mo> 
    <ms fontsize="36pt">dog</ms> 
    <mo>+</mo> 
    <ms fontstyle="normal">cat</ms> 
    <mo>+</mo> 
    <ms color="#9c0fff">pig</ms> 
    <mo>+</mo> 
    <ms fontfamily="Helvetica">goat</ms> 
  </mrow> </math>