#include <bits/stdc++.h>

using u32 = unsigned;
using i64 = long long;
using u64 = unsigned long long;

int main() {
	std::ios::sync_with_stdio(false);
	std::cin.tie(nullptr);

	std::string s;
	std::cin >> s;

	std::vector<int> stk;
	std::set<int> po;
	for (int i = 0; i < s.size(); i ++) {
		if (s[i] == '(') {
			stk.push_back(i);
		} else if (s[i] == ')') {
			if (stk.size() == 0) {
				po.insert(i);
			} else {
				stk.pop_back();
			}
		}
	}

	while (stk.size()) {
		po.insert(stk.back());
		stk.pop_back();
	}


	std::string t;
	for (int i = 0; i < s.size(); i ++) {
		if (!po.count(i)) {
			t += s[i];
		}
	}
	std::string p;
	for (int i = 0; i < t.size(); i++) {
		if (t[i] != '(') {
			p += t[i];
			continue;
		}
		if (t[i] == '(') {
			int c = 0;
			int j = i + 1;
			while (j < t.size() && t[j] != ')') {
				j++;
				if (t[j] == '+' || t[j] == '-' || t[j] == '*' || t[j] == '/' || t[j] == '^') {
					c++;
				}
			}
			if (c < 1) {
				for (int k = i + 1; k < j; k++) {
					p += t[k];
				}
			} else {
				for (int k = i; k <= j; k++) {
					p += t[k];
				}
			}
			i = j;
		}
	}
	// std::cerr << t << " " << p << "\n";
	std::stack<i64> dight;
	std::stack<char> symbol;
	auto calc = [&]() {
		i64 a = dight.top();
		dight.pop();
		i64 b = dight.top();
		dight.pop();
		char c = symbol.top();
		symbol.pop();
		switch(c) {
			case '+':dight.push(a + b); break;
			case '-':dight.push(b - a); break;
			case '*':dight.push(a * b); break;
			case '/':dight.push(b / a); break;
			case '^':dight.push(std::pow(a, b)); break;
		}
	};

	auto level = [&](char c) -> int {
		if (c == '+' || c == '-') return 1;
		if (c == '*' || c == '/') return 2;
		if (c == '^') return 3;
		return 0;
	};
	i64 res = 0;
	bool tag = false;
	for (int i = 0; i < p.size(); i ++) {
		if (p[i] >= '0' && p[i] <= '9') {
			res = res * 10 + p[i] - '0';
			tag = true;
		} else {
			//std::cerr << i << " " << tag << " " << symbol.size() << " " << dight.size() << "\n";
			if (tag) {
				dight.push(res);
				res = 0;
				tag = false;
				// continue;
			}
			if (p[i] == '(') {
				symbol.push(p[i]);
				continue;
			}
			if (p[i] == ')') {
				while (symbol.top() != '(') {
					calc();
				}
				symbol.pop();
				continue;
			}
			while (!symbol.empty() && level(p[i]) <= level(symbol.top())) {
				calc();
			}
			symbol.push(p[i]);
		}
	}
	//return 0;
	if (tag) {
		dight.push(res);	
	}
	while(!symbol.empty()) {
		calc();
	}
	std::cout<< dight.top();

	return 0;
}