Go: package main

import (
	"bufio"
	"fmt"
	"go/token"
	"go/types"
	"os"
	"strconv"
	"strings"
)

func main() {
	stdin := bufio.NewScanner(os.Stdin)
	stdin.Scan()
	n, _ := strconv.Atoi(stdin.Text())
	for i := 0; i < n; i++ {
		stdin.Scan()
		exp := strings.TrimRight(stdin.Text(), "=")
		res, _ := types.Eval(token.NewFileSet(), nil, token.NoPos, exp)
		fmt.Println(res.Value)
	}
}

C++: 
#define _CRT_SECURE_NO_WARNINGS
#define _USE_MATH_DEFINES
#include <cfloat>
#include <climits>
#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <iostream>
#include <memory>
#include <string>

#include <algorithm>
#include <complex>
#include <list>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <stack>
#include <vector>
#include <bitset>

using namespace std;

#ifdef _MSC_VER
#define __typeof__ decltype
#define strtok_r strtok_s
#endif

#define ITER(c)             __typeof__((c).begin())
#define FOREACH(it, c)      for (ITER(c) it=(c).begin(); it != (c).end(); ++it)
#define RITER(c)            __typeof__((c).rbegin())
#define RFOREACH(it, c)     for (RITER(c) it=(c).rbegin(); it != (c).rend(); ++it)
#define REP(i, n)           REPEAT(i, 0, n)
#define RREP(i, n)          RREPEAT(i, 0, n)
#define REPEAT(i, k, n)     for(int i = (k); i < (k+n); ++i)
#define RREPEAT(i, k, n)    for(int i = (k)+(n)-1; i >= (k); --i)
#define FROMTO(i,f,t)       for(int i = f; i < t; i++)
#define ALL(c)              (c).begin(), (c).end()
#define LLPOW(p1,p2)        ((ll)pow((double)(p1), (int)p2))
#define ESIZEOF(A)          (sizeof(A)/sizeof((A)[0]))
#define CIN_NO_SYNC         do { cin.tie(0); ios_base::sync_with_stdio(false); } while(0)
#define GETSTR(p)           fgets((p), sizeof(p), stdin)
#define CHOMP(p)            do{ char *_q = (p) + strlen(p)-1; if(*_q == '\n' || *_q == '\r') *_q = 0; } while(0)
#define FILL(m,v)           memset(m, v, sizeof(m))
#define mp                  make_pair
#define pb                  push_back
template<class _T> _T MAX(_T p1,_T p2){return (p1>p2)?p1:p2;} 
template<class _T> _T MIN(_T p1,_T p2){return (p1<p2)?p1:p2;} 
template <class _Tv> inline string join(_Tv &v,string sep=" "){
    ostringstream s;FOREACH(it,v){if(it!=v.begin())s<<sep;s<<*it;};return s.str();
}

typedef long long ll;
typedef unsigned long long ull;

#define X real()
#define Y imag()
typedef double D;
typedef complex<D> P;
#define EPS (1e-9)

#ifdef _DEBUG
template<class _Tv> inline void _prfe(const char *_n,_Tv _c,bool _p=false){
    ITER(_c) _it=_c.begin();
    if(_p){cout<<_n<<" = ["<<endl;for(;_it!=_c.end();++_it)cout<<"    "<<*_it<<endl;cout<<"]"<<endl; }
    else{cout<<_n<<" = [ "<<*_it++;for(;_it!=_c.end();++_it)cout<<", "<<*_it;cout<<" ]"<<endl; }
}
#define pf printf
#define pr(n) do{cout<<#n" = "<<(n)<<endl;}while(0)
#define prfe(n) _prfe(#n, n)
#define prfep(n) _prfe(#n, n, true)
#define dbgchk(n) do{if(n)throw;}while(0)
#else
#define pf(...) /* */
#define pr(...) /* */
#define prfe(...) /* */
#define prfep(...) /* */
#define dbgchk(...) /* */
#endif

template <class _Tt>
class calculate {
public:
    enum op {NUM,ADD,SUB,MUL,DIV,LPA,RPA};
private:
    typedef pair<op, _Tt> pt; 
    deque<pt> mq;
    void popf(deque<pt> &q, op &type, _Tt &num){
        type = q.front().first; num = q.front().second;
        q.pop_front();
    }
    void popb(deque<pt> &q, op &type, _Tt &num){
        type = q.back().first; num = q.back().second;
        q.pop_back();
    }
    _Tt cal2(deque<pt> &q){
        op sop, dop; _Tt snum, dnum, num = 0;
        while(!q.empty()){
            popf(q, sop, snum);
            switch(sop){
            case NUM: num = snum; break;
            case ADD: case SUB:
                popf(q, dop, dnum); dbgchk(dop != NUM);
                num = (sop == ADD) ? num+dnum : num-dnum;
                break;
            default: throw;
            }
        }
        return num;
    }
    _Tt cal(deque<pt> &q){
        deque<pt> s;
        while(!q.empty()){
            op qop; _Tt num;
            popf(q, qop, num);
            switch(qop){
            case NUM: case ADD: case SUB:
                s.pb(mp(qop,num)); break;
            case LPA:
                s.pb(mp(NUM,cal(q))); break;
            case RPA:
                return cal2(s); break;
            case MUL: case DIV:
                op sop, dop; _Tt snum, dnum;
                popb(s, sop, snum); dbgchk(sop != NUM);
                popf(q, dop, dnum); dbgchk(dop != NUM && dop != LPA);
                if(dop == LPA) dnum = cal(q);
                _Tt r = (qop == MUL) ? snum*dnum : snum/dnum;
                s.pb(mp(NUM,r));
                break;
            }
        }
        return cal2(s);
    }
public:
    void add(_Tt n){ mq.pb(mp(NUM,n)); }
    void add(op opr){ mq.pb(mp(opr,0)); }
    _Tt result(){ return cal(mq); }
};

void solve(string s){
    int n = s.length();
    calculate<int> calc;
    int num = 0;
    bool f = false;
    REP(i,n){
        if(isdigit(s[i])){
            num = num * 10 + (s[i]-'0'); f = true;
            continue;
        }
        if(f) calc.add(num);
        if(s[i] == '=') break;
        switch(s[i]){
        case '+': calc.add(calc.ADD); break;
        case '-': calc.add(calc.SUB); break;
        case '*': calc.add(calc.MUL); break;
        case '/': calc.add(calc.DIV); break;
        case '(': calc.add(calc.LPA); break;
        case ')': calc.add(calc.RPA); break;
        }
        num = 0; f = false;
    }
    cout << calc.result() << endl;
}

int main(){
    int n;
    string s; getline(cin, s);
    istringstream ss(s); ss >> n;
    REP(i,n){
        getline(cin, s);
        solve(s);
    }
    return 0;
}

C++: #include<cstdio>
#include<cmath>
#include<algorithm>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<cstdlib>
#include<iomanip>
#include<queue>
#include<set>



//expr(at the last, operate + or -)
//term(then, judge the symble * and / next to digit first)
//fact(first, judge the symble if () or digit)

using namespace std;

string str;
string::iterator it;

int term();
int fact();

int expr()
{
    int p = term();
    
    while( *it == '+' || *it == '-' )
    {
        if( *it == '+' )
        {
            it++;
            
            int q = term();
            
            p += q;
        }
        else
        {
            it++;
            int q = term();
            p -= q;
        }
    }
    
    return p;
}

int term()
{
    int p = fact();
    
    while( *it == '*' || *it == '/' )
    {
        if( *it == '*' )
        {
            it++;
            
            int q = fact();
            
            p *= q;
        }
        else
        {
            it++;
            
            int q = fact();
            
            p /= q;
        }
    }
    
    return p;
}

int fact()
{
    if( *it == '(' )
    {
        it++;         //turn to the number next to "("
        
        int p = expr();
        
        it++;
        
        return p;
    }
    else
    {
        int p = 0;
        
        while(isdigit(*it))
        {
            p *= 10;
            p += *it - '0';
            it++;
        }
        
        return p;
    }
}

int main()
{
    int n;
    
    cin>>n;
    
    while(n--)
    {
        cin>>str;
        
        str[str.size() - 1] = '\0';
        
        it = str.begin();
        
        cout<<expr()<<endl;
    }
    
    return 0;
}

/**
 * expr ::= term { ( '+' | '-' ) term }
 * term ::= fact { ( '*' | '/' ) fact }
 * fact ::= '(' expr ')' | digit
 **/