power8

Test using functions as arguments to other operators

W3C sample	WIRIS
[N/A]	$plus power sin 2 power cos 2$

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <apply>
    <csymbol cd="arith1">plus</csymbol>
    <apply>
      <csymbol cd="arith1">power</csymbol>
      <csymbol cd="transc1">sin</csymbol>
      <cn>2</cn>
    </apply>
    <apply>
      <csymbol cd="arith1">power</csymbol>
      <csymbol cd="transc1">cos</csymbol>
      <cn>2</cn>
    </apply>
  </apply>
</math>

Author: Design Science, Inc (D. Doyle)