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    <title>MathML script elements: removing children</title>

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    <!-- Test 1: remove an element at the first position in an <mroot>/<msqrt> element with various number of children. -->
    <div id="test1">Test 1:
      <math><msqrt></msqrt></math>
      <math><msqrt><mn>1</mn></msqrt></math>
      <math><msqrt><mn>1</mn><mn>2</mn></msqrt></math>
      <math><msqrt><mn>1</mn><mn>2</mn><mn>3</mn></msqrt></math>
      <math><mroot></mroot></math>
      <math><mroot><mn>1</mn></mroot></math>
      <math><mroot><mn>1</mn><mn>2</mn></mroot></math>
      <math><mroot><mn>1</mn><mn>2</mn><mn>3</mn></mroot></math>
    </div>

    <!-- Test 2: remove an <mn> element at the last position in an <mroot>/<msqrt> element with various number of children. -->
    <div id="test2">Test 2:
      <math><msqrt><mn>1</mn></msqrt></math>
      <math><msqrt><mn>1</mn><mn>2</mn></msqrt></math>
      <math><msqrt><mn>1</mn><mn>2</mn><mn>3</mn></msqrt></math>
      <math><mroot><mn>1</mn></mroot></math>
      <math><mroot><mn>1</mn><mn>2</mn></mroot></math>
      <math><mroot><mn>1</mn><mn>2</mn><mn>3</mn></mroot></math>
    </div>

    <!-- Test 3: remove an element at the second position in an <mroot>/<msqrt> element with various number of children. -->
    <div id="test3">Test 3:
      <math><msqrt><mn>1</mn></msqrt></math>
      <math><msqrt><mn>1</mn><mn>2</mn></msqrt></math>
      <math><msqrt><mn>1</mn><mn>2</mn><mn>3</mn></msqrt></math>
      <math><msqrt><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn></msqrt></math>
      <math><mroot><mn>1</mn></mroot></math>
      <math><mroot><mn>1</mn><mn>2</mn></mroot></math>
      <math><mroot><mn>1</mn><mn>2</mn><mn>3</mn></mroot></math>
      <math><mroot><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn></mroot></math>
    </div>

    <!-- Test 4: remove an element at the penultimate position in an <mroot>/<msqrt> element with various number of children. -->
    <div id="test4">Test 4:
      <math><msqrt><mn>1</mn></msqrt></math>
      <math><msqrt><mn>1</mn><mn>2</mn></msqrt></math>
      <math><msqrt><mn>1</mn><mn>2</mn><mn>3</mn></msqrt></math>
      <math><msqrt><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn></msqrt></math>
      <math><mroot><mn>1</mn></mroot></math>
      <math><mroot><mn>1</mn><mn>2</mn></mroot></math>
      <math><mroot><mn>1</mn><mn>2</mn><mn>3</mn></mroot></math>
      <math><mroot><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn></mroot></math>
    </div>

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