<?xml version="1.0" encoding="UTF-8"?>
<math xmlns="http://www.w3.org/1998/Math/MathML">
   <mi>A</mi>
   <mo>≡</mo>
   <mi>A</mi>
   <mfenced close=")" open="(">
      <mi>τ</mi>
   </mfenced>
   <mo>=</mo>
   <mfrac>
      <mn>1</mn>
      <mrow>
         <msub>
            <mi>θ</mi>
            <mn>4</mn>
         </msub>
         <mfenced close=")" open="(">
            <mrow>
               <mn>0</mn>
               <mo>|</mo>
               <mn>2</mn>
               <mi>τ</mi>
            </mrow>
         </mfenced>
      </mrow>
   </mfrac>
</math>
