Test using functions as arguments to other operators
	
	
		|   W3C sample   |   WIRIS   | 
	
	
	
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<math xmlns="http://www.w3.org/1998/Math/MathML">
  <apply>
    <plus/>
    <apply>
      <power/>
      <sin/>
      <cn>2</cn>
    </apply>
    <apply>
      <power/>
      <cos/>
      <cn>2</cn>
    </apply>
  </apply>
</math>
Author: Design Science, Inc (D. Doyle)