+ boost::scoped_ptr<MathSymbolInset> sym(new MathSymbolInset(symbol_));
+ //if (hasScripts())
+ // mathmlize(sym, os);
+ //else
+ sym->mathmlize(os);
+ os << cell(0) << "<mo> ⁢ </mo>"
+ << MTag("mrow") << "<mo> ⅆ </mo>"
+ << cell(1) << ETag("mrow");