<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
  <mi mathvariant="normal">∅</mi>
  <mo lspace="0.278em" rspace="0">⊧</mo>
  <mo lspace="0.278em" rspace="0" stretchy="false">(</mo>
  <mo lspace="0" rspace="0" stretchy="false">(</mo>
  <mi>𝑝</mi>
  <mo lspace="0.278em" rspace="0.278em" stretchy="false">⇒</mo>
  <mi>𝑞</mi>
  <mo lspace="0" rspace="0" stretchy="false">)</mo>
  <mo lspace="0.278em" rspace="0" stretchy="false">⇒</mo>
  <mo lspace="0.278em" rspace="0" stretchy="false">(</mo>
  <mi>𝑞</mi>
  <mo lspace="0.278em" rspace="0.278em" stretchy="false">⇒</mo>
  <mi>𝑟</mi>
  <mo lspace="0" rspace="0" stretchy="false">)</mo>
  <mo lspace="0" rspace="0" stretchy="false">)</mo>
  <mo lspace="0.278em" rspace="0" stretchy="false">⇒</mo>
  <mo lspace="0.278em" rspace="0" stretchy="false">(</mo>
  <mi>𝑝</mi>
  <mo lspace="0.278em" rspace="0" stretchy="false">⇒</mo>
  <mo lspace="0.278em" rspace="0" stretchy="false">(</mo>
  <mi>𝑞</mi>
  <mo lspace="0.278em" rspace="0.278em" stretchy="false">⇒</mo>
  <mi>𝑟</mi>
  <mo lspace="0" rspace="0" stretchy="false">)</mo>
  <mo lspace="0" rspace="0" stretchy="false">)</mo>
</math>
<math xmlns="http://www.w3.org/1998/Math/MathML">
  <mrow>
    <mi mathvariant="normal">s</mi>
    <mi mathvariant="normal">i</mi>
    <mi mathvariant="normal">n</mi>
  </mrow>
  <mo lspace="0" rspace="0" stretchy="false">(</mo>
  <mi>𝑥</mi>
  <mo lspace="0" rspace="0" stretchy="false">)</mo>
  <mo lspace="0.222em" rspace="0.222em">−</mo>
  <mrow>
    <mi mathvariant="normal">s</mi>
    <mi mathvariant="normal">i</mi>
    <mi mathvariant="normal">n</mi>
  </mrow>
  <mo lspace="0" rspace="0" stretchy="false">(</mo>
  <mi>𝑥</mi>
  <mo lspace="0.222em" rspace="0.222em">+</mo>
  <mn>2</mn>
  <mi>𝜋</mi>
  <mo lspace="0" rspace="0" stretchy="false">)</mo>
  <mo lspace="0.278em" rspace="0.278em">=</mo>
  <mn>0</mn>
</math>