Syntax::tsntxi: 
                 29
   "D(G, H)   ∑  | F (G) - F (H) |" is incomplete; more input is needed.
                i = 1    i       i

ToExpression::esntx: 
   Could not parse D(G,H) = \sum_{i=1}^{29} | F_i(G) - F_i(H) | as input.

<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>