#include<bits/stdc++.h>
using namespace std;
typedef long long int ll;
typedef pair<int,int> PII;
const int maxn=1e5+10;
ll val(ll x,ll y,char xp){ //自定义运算函数(xp为运算符)
if(xp=='*'||xp=='x'||xp=='X')return x*y;
if(xp=='/')return x/y;
if(xp=='+')return x+y;
if(xp=='-')return x-y;
return 0;
}
ll int_string(string s){ //string转int
ll su=0;
int i=0;
int flag=1;
if(s[0]=='-'){
flag=-1;
i=1;
}
for(;i<s.size();i++){
su=su*10+(s[i]-'0');
}
return su*flag;
}
string string_int(ll s){ //int转string
if(s==0)return "0";
ll x=s;
string res;
s=abs(s);
while(s){
res=char((s%10)+'0')+res;
s/=10;
}
if(x<0)return "-"+res;
return res;
}
vector<string> solution(string s){ //将 "123+234" 化为["123","+","234"]
vector<string> num;
for(int i=0;i<s.size();){
if(s[i]>='0'&&s[i]<='9'){
string su="";
while(i<s.size()&&s[i]>='0'&&s[i]<='9'){
su+=s[i];
i++;
}
num.push_back(su);
}else{
string su="";
su+=s[i];
num.push_back(su);
//cout<<su<<endl;
i++;
}
}
return num;
}
vector<string> get_val(vector<string> num,char xp){ //只计算运算符为xp的 算数表达式
vector<string> st;
for(int i=0;i<num.size();i++){
if(num[i][0]==xp&&num[i].size()==1){
ll x=val(int_string(st[st.size()-1]),int_string(num[++i]),xp);
st.pop_back();
st.push_back(string_int(x));
}else{
st.push_back(num[i]);
}
}
//for(int i=0;i<st.size();i++)cout<<st[i]<<" ";cout<<endl;
return st;
}
string get_nores(vector<string>num,string priority){ //求表达式值,priority 运算符优先级 (无括号)
for(int i=0;i<priority.size();i++){
num=get_val(num,priority[i]);
}
return num[0];
}
string get_res(vector<string>num,string priority){ //求表达式值,priority 为运算符优先级
int n=num.size();
vector<string> ans;
stack<int> st;
for(int i=0;i<n;i++){
ans.push_back(num[i]);
if(num[i][0]=='(')st.push(ans.size()-1);
else if(num[i][0]==')'){
int u=st.top();st.pop();
vector<string> x(ans.begin()+u+1,ans.end()-1);
string suw = get_nores(x,priority);
ans.erase(ans.begin()+u,ans.end());
ans.push_back(suw);
}
}
//for(int i=0;i<ans.size();i++)cout<<ans[i]<<" ";cout<<endl;
return get_nores(ans,priority);
}
ll ShaGua(string s,string priority){//傻瓜式运算,priority运算符优先级(形如【x == / > + == - 】 即为"x/+-"
vector<string>num;
num = solution(s);
return int_string(get_res(num,priority));
}
int main(){
ios::sync_with_stdio(0);
string s;cin>>s;
cout<<ShaGua(s,"x/+-")<<endl;
return 0;
}