public String toString() {StringBuilder r = new StringBuilder();if (isOperatorInfix()) {infixToString(r);} else {prefixToString(r);}weightToString(r);return r.toString();}
public override string ToString(){StringBuilder r = new StringBuilder();if (IsOperatorInfix){InfixToString(r);}else{PrefixToString(r);}WeightToString(r);return r.ToString();}