using System;
using System.Text.RegularExpressions;

public class Test
{
	public static void Main()
	{
		var inputTests = new[]
			{
				"5*-3",
				"(5--5)-3",
				"(5-------5)-3",
				"-(1-2)-3"
			};
		
		foreach (var line in inputTests)
		{
			Console.WriteLine(line + "  ->  " + RemoveUnaryOperators(line));
		}
	}
	
	private static Regex _regex = new Regex(@"(?<=^|[-(+*/])-(?<value>\d+|\((?:[^\(\)]|(?<open>\()|(?<-open>\)))+?(?(open)(?!))\))", RegexOptions.Compiled);
	
	private static string RemoveUnaryOperators(string input)
    {
        var result = Regex.Replace(input ?? string.Empty, @"\s+", string.Empty);
        string tmp;
        do
        {
            tmp = result;
            result = _regex.Replace(result, @"(0-${value})");
        }
        while (result != tmp);

        return result;
    }
}