Semantic-Embedding-Examples.md

 Some simple examples of embedded semantic tree. Note that for readability the attributes have been abbreviated
 
+## Single Operation
+
 Original MathML:
 ```html
 <math>
@@ -45,6 +47,7 @@ Semantically enriched MathML:
 
 ```
 
+## Operation and Relation
 
 Original MathML:
 ```html
@@ -98,4 +101,39 @@ Enriched MathML:
     </mrow>
   </mrow>
 </math>
-```
\ No newline at end of file
+```
+
+## Multiple Operations
+
+```html
+<math>
+  <mi>a</mi>
+  <mo>+</mo>
+  <mi>b</mi>
+  <mo>-</mo>
+  <mi>c</mi>
+  <mo>+</mo>
+  <mi>d</mi>
+</math>
+
+```
+
+```html
+<math>
+  <mrow semantic-type="infixop" semantic-role="addition" id="9" semantic-content="5" semantic-children="8,6">
+    <mrow semantic-type="infixop" semantic-role="subtraction" id="8" semantic-content="3" semantic-children="7,4" semantic-parent="8">
+      <mrow semantic-type="infixop" semantic-role="addition" id="7" semantic-content="1" semantic-children="0,2" semantic-parent="7">
+        <mi semantic-type="identifier" semantic-role="latinletter" id="0" semantic-parent="0">a</mi>
+        <mo semantic-type="operator" semantic-role="addition" id="1" semantic-operator="infixop,+" semantic-parent="1">+</mo>
+        <mi semantic-type="identifier" semantic-role="latinletter" id="2" semantic-parent="2">b</mi>
+      </mrow>
+      <mo semantic-type="operator" semantic-role="subtraction" id="3" semantic-operator="infixop,-" semantic-parent="3">-</mo>
+      <mi semantic-type="identifier" semantic-role="latinletter" id="4" semantic-parent="4">c</mi>
+    </mrow>
+    <mo semantic-type="operator" semantic-role="addition" id="5" semantic-operator="infixop,+" semantic-parent="5">+</mo>
+    <mi semantic-type="identifier" semantic-role="latinletter" id="6" semantic-parent="6">d</mi>
+  </mrow>
+</math>
+
+```
+