data/mathoid/17.mml
<math
xmlns="http://www.w3.org/1998/Math/MathML" display="block" alttext="bold m 1">
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<mi mathvariant="bold" data-semantic-type="identifier" data-semantic-role="latinletter" data-semantic-font="bold" data-semantic-id="0" data-semantic-parent="2">m</mi>
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<annotation encoding="application/x-tex">\mathbf {m} _{1}</annotation>
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</math>