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                      <XMTok role="SUBSCRIPTOP" scriptpos="post7"/>
                      <XMTok role="UNKNOWN" font="italic">b</XMTok>
                      <XMTok meaning="11" role="NUMBER">11</XMTok>
                    </XMApp>
                  </XMApp>
                </XMath>
              </Math>
            </td>
          </MathBranch>
        </MathFork>
        <MathFork>
          <Math tex="\displaystyle a_{{12}} =b_{{12}}" text="a _ 12 = b _ 12">
            <XMath>
              <XMApp>
                <XMTok meaning="equals" role="RELOP">=</XMTok>
                <XMApp>
                  <XMTok role="SUBSCRIPTOP" scriptpos="post7"/>
                  <XMTok role="UNKNOWN" font="italic">a</XMTok>
                  <XMTok meaning="12" role="NUMBER">12</XMTok>
                </XMApp>
                <XMApp>
                  <XMTok role="SUBSCRIPTOP" scriptpos="post7"/>
                  <XMTok role="UNKNOWN" font="italic">b</XMTok>
                  <XMTok meaning="12" role="NUMBER">12</XMTok>
                </XMApp>
              </XMApp>
            </XMath>
          </Math>
          <MathBranch>
            <td align="right">
              <Math mode="inline" tex="\displaystyle a_{{12}}" xml:id="S0.E11.m3a" text="a _ 12">
                <XMath>
                  <XMApp>
                    <XMTok role="SUBSCRIPTOP" scriptpos="post7"/>
                    <XMTok role="UNKNOWN" font="italic">a</XMTok>
                    <XMTok meaning="12" role="NUMBER">12</XMTok>
                  </XMApp>
                </XMath>
              </Math>
            </td>
            <td align="left">
              <Math mode="inline" tex="\displaystyle=b_{{12}}" xml:id="S0.E11.m4a" text="absent = b _ 12">
                <XMath>
                  <XMApp>
                    <XMTok meaning="equals" role="RELOP">=</XMTok>
                    <XMTok meaning="absent"/>
                    <XMApp>
                      <XMTok role="SUBSCRIPTOP" scriptpos="post7"/>
                      <XMTok role="UNKNOWN" font="italic">b</XMTok>
                      <XMTok meaning="12" role="NUMBER">12</XMTok>
                    </XMApp>
                  </XMApp>
                </XMath>
              </Math>
            </td>
          </MathBranch>
        </MathFork>
      </equation>
      <equation refnum="12" xml:id="S0.E12">
        <MathFork>
          <Math tex="\displaystyle a_{{21}} =b_{{21}}" text="a _ 21 = b _ 21">
            <XMath>
              <XMApp>
                <XMTok meaning="equals" role="RELOP">=</XMTok>
                <XMApp>
                  <XMTok role="SUBSCRIPTOP" scriptpos="post7"/>
                  <XMTok role="UNKNOWN" font="italic">a</XMTok>
                  <XMTok meaning="21" role="NUMBER">21</XMTok>
                </XMApp>
                <XMApp>
                  <XMTok role="SUBSCRIPTOP" scriptpos="post7"/>
                  <XMTok role="UNKNOWN" font="italic">b</XMTok>
                  <XMTok meaning="21" role="NUMBER">21</XMTok>
                </XMApp>
              </XMApp>
            </XMath>
          </Math>
          <MathBranch>
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                <XMath>
                  <XMApp>
                    <XMTok role="SUBSCRIPTOP" scriptpos="post7"/>
                    <XMTok role="UNKNOWN" font="italic">a</XMTok>
                    <XMTok meaning="21" role="NUMBER">21</XMTok>
                  </XMApp>
                </XMath>
              </Math>
            </td>
            <td align="left">
              <Math mode="inline" tex="\displaystyle=b_{{21}}" xml:id="S0.E12.m2a" text="absent = b _ 21">
                <XMath>
                  <XMApp>
                    <XMTok meaning="equals" role="RELOP">=</XMTok>
                    <XMTok meaning="absent"/>
                    <XMApp>
                      <XMTok role="SUBSCRIPTOP" scriptpos="post7"/>
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                      <XMTok meaning="21" role="NUMBER">21</XMTok>
                    </XMApp>
                  </XMApp>
                </XMath>
              </Math>
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          </MathBranch>
        </MathFork>
        <MathFork>
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              <XMApp>
                <XMTok meaning="equals" role="RELOP">=</XMTok>
                <XMApp>
                  <XMTok role="SUBSCRIPTOP" scriptpos="post7"/>
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                  <XMTok meaning="22" role="NUMBER">22</XMTok>
                </XMApp>
                <XMApp>
                  <XMTok meaning="plus" role="ADDOP">+</XMTok>
                  <XMApp>
                    <XMTok role="SUBSCRIPTOP" scriptpos="post7"/>
                    <XMTok role="UNKNOWN" font="italic">b</XMTok>
                    <XMTok meaning="22" role="NUMBER">22</XMTok>
                  </XMApp>
                  <XMApp>
                    <XMTok role="SUBSCRIPTOP" scriptpos="post7"/>
                    <XMTok role="UNKNOWN" font="italic">c</XMTok>
                    <XMTok meaning="22" role="NUMBER">22</XMTok>
                  </XMApp>
                </XMApp>
              </XMApp>
            </XMath>
          </Math>
          <MathBranch>
            <td align="right">
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                <XMath>
                  <XMApp>
                    <XMTok role="SUBSCRIPTOP" scriptpos="post7"/>
                    <XMTok role="UNKNOWN" font="italic">a</XMTok>
                    <XMTok meaning="22" role="NUMBER">22</XMTok>
                  </XMApp>
                </XMath>
              </Math>
            </td>
            <td align="left">
              <Math mode="inline" tex="\displaystyle=b_{{22}}+c_{{22}}" xml:id="S0.E12.m4a" text="absent = b _ 22 + c _ 22">
                <XMath>
                  <XMApp>
                    <XMTok meaning="equals" role="RELOP">=</XMTok>
                    <XMTok meaning="absent"/>
                    <XMApp>
                      <XMTok meaning="plus" role="ADDOP">+</XMTok>
                      <XMApp>
                        <XMTok role="SUBSCRIPTOP" scriptpos="post7"/>
                        <XMTok role="UNKNOWN" font="italic">b</XMTok>
                        <XMTok meaning="22" role="NUMBER">22</XMTok>
                      </XMApp>
                      <XMApp>
                        <XMTok role="SUBSCRIPTOP" scriptpos="post7"/>
                        <XMTok role="UNKNOWN" font="italic">c</XMTok>
                        <XMTok meaning="22" role="NUMBER">22</XMTok>
                      </XMApp>
                    </XMApp>
                  </XMApp>
                </XMath>
              </Math>
            </td>
          </MathBranch>
        </MathFork>
      </equation>
    </equationgroup>
  </para>
</document>
