using System;
using System.Numerics;

namespace _0109
{
	class Program
	{
		static string s;
		public static int pointer;
		static BigInteger number()
		{
			BigInteger ret = 0;
			while (pointer < s.Length && '0' <= s[pointer] && s[pointer] <= '9')
			{
				ret *= 10;
				ret += s[pointer] - '0';
				pointer++;
			}
			return ret;
		}
		static BigInteger term()
		{
			BigInteger ret = factor();
			while (pointer < s.Length)
			{
				if (s[pointer] == '*')
				{
					pointer++;
					ret *= factor();
				}
				else if (s[pointer] == '/')
				{
					pointer++;
					ret /= factor();
				}
				else break;
			}
			return ret;
		}
		static BigInteger expression()
		{
			BigInteger ret = term();
			while (pointer < s.Length)
			{
				if (s[pointer] == '+')
				{
					pointer++;
					ret += term();
				}
				else if (s[pointer] == '-')
				{
					pointer++;
					ret -= term();
				}
				else break;
			}
			return ret;
		}
		static BigInteger factor()
		{
			if (s[pointer] == '(')
			{
				pointer++;
				BigInteger ret = expression();
				pointer++;
				return ret;
			}
			else return number();
		}
		static void Main(string[] args)
		{
			string[]v = Console.ReadLine().Split();
			s = "0" + v[0] + v[1];
			pointer = 0;
			Console.WriteLine(expression());
		}
	}
}