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();}