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x - 3 + x - 3 +

Source Code:

    <math> 
      <mrow> 
        <msqrt> 
          <mi>x</mi> 
          <mo>-</mo> 
          <mn>3</mn> 
        </msqrt> 
        <mo>+</mo> 
        <msqrt> 
          <mrow> 
            <mi>x</mi> 
            <mo>-</mo> 
            <mn>3</mn> 
          </mrow> 
        </msqrt> 
        <mo>+</mo> 
        <msqrt> </msqrt> 
      </mrow> 
    </math>