ag-gipp/GoUldI

<math 
  xmlns="http://www.w3.org/1998/Math/MathML" display="block" alttext="StartSet 3 k plus 4 EndSet subset-of German upper C">
  <semantics>
    <mrow data-semantic-type="infixop" data-semantic-role="unknown" data-semantic-id="15" data-semantic-children="12,14" data-semantic-content="13">
      <mrow data-semantic-type="fenced" data-semantic-role="leftright" data-semantic-id="12" data-semantic-children="10" data-semantic-content="0,11" data-semantic-parent="15">
        <mo data-semantic-type="fence" data-semantic-role="open" data-semantic-id="0" data-semantic-parent="12" data-semantic-operator="fenced">{</mo>
        <mrow data-semantic-type="punctuated" data-semantic-role="text" data-semantic-id="10" data-semantic-children="8,5" data-semantic-content="9" data-semantic-parent="12">
          <mrow data-semantic-type="infixop" data-semantic-role="addition" data-semantic-id="8" data-semantic-children="7,4" data-semantic-content="3" data-semantic-parent="10">
            <mrow data-semantic-type="infixop" data-semantic-role="implicit" data-semantic-id="7" data-semantic-children="1,2" data-semantic-content="6" data-semantic-parent="8">
              <mn data-semantic-type="number" data-semantic-role="integer" data-semantic-font="normal" data-semantic-id="1" data-semantic-parent="7">3</mn>
              <mo data-semantic-type="operator" data-semantic-role="multiplication" data-semantic-id="6" data-semantic-parent="7" data-semantic-added="true" data-semantic-operator="infixop,⁢">⁢</mo>
              <mi data-semantic-type="identifier" data-semantic-role="latinletter" data-semantic-font="italic" data-semantic-id="2" data-semantic-parent="7">k</mi>
            </mrow>
            <mo data-semantic-type="operator" data-semantic-role="addition" data-semantic-id="3" data-semantic-parent="8" data-semantic-operator="infixop,+">+</mo>
            <mn data-semantic-type="number" data-semantic-role="integer" data-semantic-font="normal" data-semantic-id="4" data-semantic-parent="8">4</mn>
          </mrow>
          <mo data-semantic-type="punctuation" data-semantic-role="dummy" data-semantic-id="9" data-semantic-parent="10" data-semantic-added="true" data-semantic-operator="punctuated">⁣</mo>
          <mtext data-semantic-type="text" data-semantic-role="unknown" data-semantic-id="5" data-semantic-parent="10"/>
        </mrow>
        <mo data-semantic-type="fence" data-semantic-role="close" data-semantic-id="11" data-semantic-parent="12" data-semantic-operator="fenced">}</mo>
      </mrow>
      <mo data-semantic-type="operator" data-semantic-role="unknown" data-semantic-id="13" data-semantic-parent="15" data-semantic-operator="infixop,⊂">⊂
        <!-- ⊂ -->
      </mo>
      <mrow class="MJX-TeXAtom-ORD">
        <mrow class="MJX-TeXAtom-ORD">
          <mi mathvariant="fraktur" data-semantic-type="identifier" data-semantic-role="latinletter" data-semantic-font="fraktur" data-semantic-id="14" data-semantic-parent="15">C</mi>
        </mrow>
      </mrow>
    </mrow>
    <annotation encoding="application/x-tex">\left\{3k+4\ \right\}\subset {\mathfrak {C}}</annotation>
  </semantics>
</math>