public String toFormulaString(String[] operands){StringBuilder buffer = new StringBuilder();buffer.append(operands[ 0 ]);buffer.append(",");buffer.append(operands[ 1 ]);return buffer.toString();}

public override String ToFormulaString(String[] operands){StringBuilder buffer = new StringBuilder();buffer.Append(operands[0]);buffer.Append(",");buffer.Append(operands[1]);return buffer.ToString();}
