rec-lambda1

lambda sin(x + 1)

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <bind>
    <csymbol cd="fns1">lambda</csymbol>
    <bvar>
      <ci>x</ci>
    </bvar>
    <apply>
      <csymbol cd="transc1">sin</csymbol>
      <apply>
        <csymbol cd="arith1">plus</csymbol>
        <ci>x</ci>
        <cn>1</cn>
      </apply>
    </apply>
  </bind>
</math>

Author: MathML 2 Recommendation