dir

html,
body {
  height: 100%;
}

body {
  display: grid;
  place-items: center;
  font-size: 1.5rem;
}

<!-- Moroccan style -->
<math display="block" dir="ltr">
  <msqrt>
    <mi>س</mi>
  </msqrt>
  <mo>=</mo>
  <msup>
    <mn>3</mn>
    <mi>ب</mi>
  </msup>
</math>

<!-- Maghreb/Machrek style -->
<math display="block" dir="rtl">
  <msqrt>
    <mi>س</mi>
  </msqrt>
  <mo>=</mo>
  <msup>
    <mn>٣</mn>
    <mi>ب</mi>
  </msup>
</math>

<math dir="ltr">
<math dir="rtl">