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();}