ag-gipp/GoUldI

                  n - k
Syntax::tsntxi: "y      ." is incomplete; more input is needed.

ToExpression::esntx: 
   Could not parse (x+y)^n = \sum_{k=0}^n {n \choose k}x^{n-k}y^k = as input.
                      \sum_{k=0}^n {n \choose k}x^{k}y^{n-k}.


<math 
  xmlns='http://www.w3.org/1998/Math/MathML'>
  <semantics>
    <mi>$Failed</mi>
    <annotation-xml encoding='MathML-Content'>
      <ci>$Failed</ci>
    </annotation-xml>
  </semantics>
</math>