package com.telerikacademy;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.math.BigDecimal;

public class Solve2 {
    private static String input;
    private static int charPosition;
    private static int nextCharPosition;

    public static void main(String[] args) throws IOException {
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
        input = bufferedReader.readLine();
        nextCharPosition = input.charAt(0);

        System.out.println(parseExpression().toBigInteger());
    }

    private static boolean isEqual(int charForCheck) {
        while (nextCharPosition == ' ')
            nextCharPosition = (++charPosition < input.length()) ? input.charAt(charPosition) : -1;
        if (nextCharPosition == charForCheck) {
            nextCharPosition = (++charPosition < input.length()) ? input.charAt(charPosition) : -1;
            return true;
        }
        return false;
    }

    private static BigDecimal parseExpression() {
        BigDecimal result = BigDecimal.ZERO;
        int startPos = charPosition;

        if (isEqual('(')) {
            result = parseExpression();
            isEqual(')');
        } else if (nextCharPosition >= '0' && nextCharPosition <= '9') {
            while (nextCharPosition >= '0' && nextCharPosition <= '9')
                nextCharPosition = (++charPosition < input.length()) ? input.charAt(charPosition) : -1;
            result = BigDecimal.valueOf(Double.parseDouble(input.substring(startPos, charPosition)));
        }

        while(true) {
            if (isEqual('+'))
                result = result.add(parseExpression());
            else if (isEqual('-'))
                result = result.subtract(parseExpression());
            else if (isEqual('*'))
                result = result.multiply(parseExpression());
            else
                return result;
        }
    }
}