#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double db;

int T;
db x[25],y[25];

int ch[2][25],val[25];
int sonc[8] = {0,2,2,2,2,1,1,0}; // / + - * / sin cos x
int tot = 0,cplx = 0;

db chk(int u,db x,int &flg){
    if(val[u] == 7) return x;
    db ls,rs;
    ls = chk(ch[0][u],x,flg);
    if(val[u] >= 1 && val[u] <= 4) rs = chk(ch[1][u],x,flg);
    if(val[u] == 4 && rs < 0.01) flg = 0;
    
    if(val[u] == 1) return ls + rs;
    if(val[u] == 2) return ls - rs;
    if(val[u] == 3) return ls * rs;
    if(val[u] == 4) return ls / rs;
    if(val[u] == 5) return sin(ls);
    if(val[u] == 6) return cos(ls);

    assert(0);
}

void print(int u){
    cout << '(';
    if(val[u] == 7) cout << 'x';
    if(val[u] == 5) cout << "sin(";
    if(val[u] == 6) cout << "cos(";

    if(val[u] >= 1 && val[u] <= 6) print(ch[0][u]);
    if(val[u] >= 5 && val[u] <= 6) cout << ')';

    if(val[u] == 1) cout << "+";
    if(val[u] == 2) cout << "-";
    if(val[u] == 3) cout << "*";
    if(val[u] == 4) cout << "/";
    
    if(val[u] >= 1 && val[u] <= 4) print(ch[1][u]);

    cout << ')';
}

void dfs(int u){
    // cout << u << ' ' << tot << ' ' << cplx << endl;
    // for(int i = 1;i <= tot;i ++) cout << val[i] << ',' << ch[0][i] << ',' << ch[1][i] << " \n"[i == tot];
    // cout << endl;
    if(u > tot){
        int flg = 1;
        for(int i = 1;i <= T;i ++){
            if(fabs(chk(1,x[i],flg) - y[i]) / max(1.0L,fabs(y[i])) > 0.99e-3) flg = 0;
        }
        if(flg){
            print(1);
            exit(0);
        }
        return;
    }
    for(int i = 1;i <= 7;i ++){
        if(sonc[i] + cplx > 9) continue;
        for(int j = 0;j < sonc[i];j ++) ch[j][u] = ++ tot;
        cplx += sonc[i];
        val[u] = i;
        dfs(u + 1);
        val[u] = 0;
        tot -= sonc[i];
        cplx -= sonc[i];
        for(int j = 0;j < sonc[i];j ++) ch[j][u] = 0;
    }
}

void solve(){
    cin >> T;
    for(int i = 1;i <= T;i ++) cin >> x[i] >> y[i];
    tot = 1; cplx = 0;
    dfs(1);
    cout << "NO\n";
}

int main(){
    ios::sync_with_stdio(false);
    solve();
    return 0;
}