ag-gipp/GoUldI

<math 
  xmlns="http://www.w3.org/1998/Math/MathML" display="block" alttext="f left-parenthesis x right-parenthesis equals sigma-summation Underscript k equals 0 Overscript normal infinity Endscripts a Subscript k Baseline x Superscript k">
  <semantics>
    <mrow data-semantic-type="relseq" data-semantic-role="equality" data-semantic-id="24" data-semantic-children="23,21" data-semantic-content="4">
      <mrow data-semantic-type="appl" data-semantic-role="simple function" data-semantic-id="23" data-semantic-children="0,18" data-semantic-content="22,0" data-semantic-parent="24">
        <mi data-semantic-type="identifier" data-semantic-role="simple function" data-semantic-font="italic" data-semantic-id="0" data-semantic-parent="23" data-semantic-operator="appl">f</mi>
        <mo data-semantic-type="punctuation" data-semantic-role="application" data-semantic-id="22" data-semantic-parent="23" data-semantic-added="true" data-semantic-operator="appl">⁡</mo>
        <mrow data-semantic-type="fenced" data-semantic-role="leftright" data-semantic-id="18" data-semantic-children="2" data-semantic-content="1,3" data-semantic-parent="23">
          <mo stretchy="false" data-semantic-type="fence" data-semantic-role="open" data-semantic-id="1" data-semantic-parent="18" data-semantic-operator="fenced">(</mo>
          <mi data-semantic-type="identifier" data-semantic-role="latinletter" data-semantic-font="italic" data-semantic-id="2" data-semantic-parent="18">x</mi>
          <mo stretchy="false" data-semantic-type="fence" data-semantic-role="close" data-semantic-id="3" data-semantic-parent="18" data-semantic-operator="fenced">)</mo>
        </mrow>
      </mrow>
      <mo data-semantic-type="relation" data-semantic-role="equality" data-semantic-id="4" data-semantic-parent="24" data-semantic-operator="relseq,=">=</mo>
      <mrow data-semantic-type="bigop" data-semantic-role="sum" data-semantic-id="21" data-semantic-children="11,20" data-semantic-content="5" data-semantic-parent="24">
        <munderover data-semantic-type="limboth" data-semantic-role="sum" data-semantic-id="11" data-semantic-children="5,9,10" data-semantic-parent="21">
          <mo data-semantic-type="largeop" data-semantic-role="sum" data-semantic-id="5" data-semantic-parent="11" data-semantic-operator="bigop">∑
            <!-- ∑ -->
          </mo>
          <mrow class="MJX-TeXAtom-ORD" data-semantic-type="relseq" data-semantic-role="equality" data-semantic-id="9" data-semantic-children="6,8" data-semantic-content="7" data-semantic-parent="11">
            <mi data-semantic-type="identifier" data-semantic-role="latinletter" data-semantic-font="italic" data-semantic-id="6" data-semantic-parent="9">k</mi>
            <mo data-semantic-type="relation" data-semantic-role="equality" data-semantic-id="7" data-semantic-parent="9" data-semantic-operator="relseq,=">=</mo>
            <mn data-semantic-type="number" data-semantic-role="integer" data-semantic-font="normal" data-semantic-id="8" data-semantic-parent="9">0</mn>
          </mrow>
          <mrow class="MJX-TeXAtom-ORD">
            <mi mathvariant="normal" data-semantic-type="identifier" data-semantic-role="unknown" data-semantic-font="normal" data-semantic-id="10" data-semantic-parent="11">∞
              <!-- ∞ -->
            </mi>
          </mrow>
        </munderover>
        <mrow data-semantic-type="infixop" data-semantic-role="implicit" data-semantic-id="20" data-semantic-children="14,17" data-semantic-content="19" data-semantic-parent="21">
          <msub data-semantic-type="subscript" data-semantic-role="latinletter" data-semantic-id="14" data-semantic-children="12,13" data-semantic-parent="20">
            <mi data-semantic-type="identifier" data-semantic-role="latinletter" data-semantic-font="italic" data-semantic-id="12" data-semantic-parent="14">a</mi>
            <mrow class="MJX-TeXAtom-ORD">
              <mi data-semantic-type="identifier" data-semantic-role="latinletter" data-semantic-font="italic" data-semantic-id="13" data-semantic-parent="14">k</mi>
            </mrow>
          </msub>
          <mo data-semantic-type="operator" data-semantic-role="multiplication" data-semantic-id="19" data-semantic-parent="20" data-semantic-added="true" data-semantic-operator="infixop,⁢">⁢</mo>
          <msup data-semantic-type="superscript" data-semantic-role="latinletter" data-semantic-id="17" data-semantic-children="15,16" data-semantic-parent="20">
            <mi data-semantic-type="identifier" data-semantic-role="latinletter" data-semantic-font="italic" data-semantic-id="15" data-semantic-parent="17">x</mi>
            <mrow class="MJX-TeXAtom-ORD">
              <mi data-semantic-type="identifier" data-semantic-role="latinletter" data-semantic-font="italic" data-semantic-id="16" data-semantic-parent="17">k</mi>
            </mrow>
          </msup>
        </mrow>
      </mrow>
    </mrow>
    <annotation encoding="application/x-tex">f(x)=\sum _{k=0}^{\infty }a_{k}x^{k}</annotation>
  </semantics>
</math>