subtraction-rtl1

<math xmlns="http://www.w3.org/1998/Math/MathML" display="block" dir="rtl">
  <mstack charspacing="loose">
    <mscarries position="2" crossout="updiagonalstrike">
      <mn>٢</mn>
      <mn>١٢</mn>
    </mscarries>
    <mn>٣٢٣٥</mn>
    <msrow>
      <mn>١٧١٤</mn>
      <mo>-</mo>
    </msrow>
    <msline/>
    <mn>١٥٢١</mn>
  </mstack>
</math>

Author: Abdelshafi Bekhit, school-book of elementary school for mathematics, Ministry of Education in Saudi Arabia.