#include <fstream>
#include<string>
using namespace std;
#define MAXINT 10000000000
ifstream f("evaluare.in");
ofstream g("evaluare.out");
struct sir
{
	long int val;
	char operant;
}b[100000];
struct lista
{
	lista*st, *dr;
	long int val;
	char op;
};
lista*prim = NULL;
lista*ult = NULL;
char c;
long int k, v[100000],l;
void add(long int);
void citire()
{
	while (!f.eof())
	{ 
		f >> c;
		if (f.eof()) break;
		if (c >= '0'&&c <= '9'&&b[k].val==NULL)
		{
			b[k].val = c - '0';
			b[k].operant = NULL;
			v[k] = MAXINT;
		}
		else if (c >= '0'&&c <= '9'&&b[k].val != NULL)
		{
			b[k].val = b[k].val * 10 + c - '0';
		}
		else {
			if(b[k].val!=NULL)k++;
			b[k].operant = c;
			b[k].val = NULL;
			if (c == '(')
			{
				v[k] = 0;
				l = l + 10;
			}
			else if (c == ')')
			{
				v[k] = 0;
				l = l - 10;
			}
			else if (b[k].operant == '-' || b[k].operant == '+')v[k] = l + 1;
			else v[k] = l + 2;
			k++;
		}
	}

}
void RSD(long int st,long  int dr)
{
	long int x = MAXINT, i, l = -1;
	for (i = st; i <= dr; i++)
	if (x >= v[i] && v[i] != 0)
	{
		x = v[i];
		l = i;
	}
	if (l != -1)
	{
		add(l);
		RSD(st, l - 1);
		RSD(l + 1, dr);
	}



}
void add(long int x)
{
	lista*q = new lista;
	if (b[x].val!=NULL)q->val = b[x].val;
	else q->op =b[x].operant;
	if (prim == NULL)
	{
		q->st = NULL;
		q->dr = NULL;
		prim = q;
		ult = q;
	}
	else
	{
		q->st = ult;
		q->dr = NULL;
		ult->dr = q;
		ult = q;
	}
}
void calcul()
{
	while (ult != prim)
	{
		lista*p = new lista;
		p = ult;
		while (p->op <= 0 && p->st != NULL)p = p->st;
		if (p->op == '+')
		{
			p->val = p->dr->val + p->dr->dr->val;
			p->op = NULL;
		}
		else if (p->op == '*')
		{
			p->val = p->dr->val * p->dr->dr->val;
			p->op = NULL;
		}
		else if (p->op == '-')
		{
			p->val = p->dr->val - p->dr->dr->val;
			p->op = NULL;
		}
		else if (p->op == '/')
		{
			p->val = p->dr->val / p->dr->dr->val;
			p->op = NULL;
		}
		if (p->dr->dr->dr == NULL)
		{
			ult = p;
			p->dr = NULL;
		}
		else {
			p->dr = p->dr->dr->dr;
			p->dr->st = p;
		}

	}
}
int main()
{
	citire();
	RSD(0,k);
	calcul();
	g << prim->val;
	return 0;
}