#include<bits/stdc++.h>

using namespace std;

#define db double
#define mp make_pair
#define ep emplace_back

valarray<db> x_arr;
valarray<db> y_arr;

inline void ins(vector<pair<string, valarray<db>>> &arr, const string &f, const valarray<db> &y){
    if(abs(y - y_arr).max() <= 1e-3){
        printf("%s\n", f.c_str());
        exit(0);
    }
    arr.ep(mp(f, y));
}


vector<pair<string, valarray<db>>> expr[10];


int main(){
    int n; cin >> n;
    x_arr.resize(n);
    y_arr.resize(n);
    for(int i = 0; i < n; ++i){
       cin >> x_arr[i] >> y_arr[i];
    }
    ins(expr[0], "x", x_arr);
    for(int i = 1; i <= 9; ++i){
        for(auto &[f, y]: expr[i - 1]){
            ins(expr[i], "sin(" + f + ")", sin(y));
            ins(expr[i], "cos(" + f + ")", cos(y));
        }
        for(int j = 0; j < i - 1; ++j){
            for(auto &[f1, y1] : expr[j]){
                for(auto &[f2, y2] : expr[i - j - 2]){
                    if(j >= i - j - 2){
                        ins(expr[i], "(" + f1 + "+" + f2 + ")", y1 + y2);
                        ins(expr[i], "(" + f1 + "*" + f2 + ")", y1 * y2);
                    }
                    ins(expr[i], "(" + f1 + "-" + f2 + ")", y1 - y2);
                    if(abs(y2).min() >= 0.01){
                        ins(expr[i], "(" + f1 + "/" + f2 + ")", y1 / y2);
                    }
                }
            }
        }
    }
}