#include<bits/stdc++.h>
using namespace std;
long long a[1005],b[1005],n;
long long c[1005],d[1005],m;
long long x[1005],y[1005],ansn;
long long pd[1005];
signed main(){
	freopen("mul.in","r",stdin);
    freopen("mul.out","w",stdout);
	long long xx=0;
	while(1){
		if(n%2==1){
			b[n/2+1]=xx;
		}
		else{
			a[n/2]=xx;
		}
		n++;
		cin>>xx;
		if(xx==-1 && n%2==1){
			break;
		}
	}
	xx=0;
    while(1){
		if(m%2==1){
			d[m/2+1]=xx;
		}
		else{
			c[m/2]=xx;
		}
		m++;
		cin>>xx;
		if(xx==-1 && m%2==1){
			break;
		}
	}
	n--;
	m--;
	n/=2;
	m/=2;
	for(long long i=1;i<=n;i++){
		for(long long j=1;j<=m;j++){
			ansn++;
			x[ansn]=a[i]*c[j];
			y[ansn]=b[i]+d[j];
		}
	}
	for(long long i=1;i<=ansn;i++){
		for(long long j=1;j<=ansn;j++){
		   if(y[i]>y[j]){
		   	swap(y[i],y[j]);
		   	swap(x[i],x[j]);
		   }	
		}
	}
	for(long long i=2;i<=ansn;i++){
		if(y[i]==y[i-1]){
			y[i-1]=0;
			x[i]+=x[i-1];
			x[i-1]=0;
			pd[i-1]=1;
		}
	}
	long long firstt=0;
	for(long long i=1;i<=ansn;i++){
		if(pd[i]==0){
			if(y[i]==0){
				if(firstt==0){
					cout<<x[i];
					firstt=1;
				}
				else if(x[i]<0){
					cout<<x[i];
				}
				else{
					cout<<"+"<<x[i];
				}
			}
			else if(firstt==0){
				cout<<x[i]<<"x^"<<y[i];
				firstt=1;
			}
			else{
				if(x[i]<0){
					cout<<x[i]<<"x^"<<y[i];
				}
				else{
					cout<<"+"<<x[i]<<"x^"<<y[i];
				}
			}
		}
	}
	return 0;
}