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<?xml version="1.0"?> <!DOCTYPE mrow SYSTEM "mathml.dtd"> <mrow> <mroot> <mrow> <mn>1</mn> <mo>-</mo> <mfrac> <mi>x</mi> <mn>2</mn> </mfrac> </mrow> <mn>3</mn> </mroot> </mrow>
<?xml version="1.0"?>
<!DOCTYPE mrow SYSTEM "mathml.dtd">
<mrow>
<mroot>
<mn>1</mn>
<mo>-</mo>
<mfrac>
<mi>x</mi>
<mn>2</mn>
</mfrac>
</mrow>
<mn>3</mn>
</mroot>