#include<bits/stdc++.h>
int main()
{
	int first[1001];
	int second[1001];
	for(int i=0;i<1001;i+=1)
	{
		first[i]=0000;
		second[i]=0000;
	}
	for(int t=0;t<2;t+=1)//处理输入 
	{
		while(true)
		{
			int times,num;
			std::cin>>times;
			if(times!=-1)
			{
				std::cin>>num;
				if(t==0){first[times]=num;}
				else{second[times]=num;}
			}
			else{break;}
		}
	}
	int all_num[2003];
	for(int tr=0;tr<2003;tr+=1){all_num[tr]=0;}
	for(int y=0;y<1001;y+=1)//计算结果 
	{
		for(int u=0;u<1001;u+=1)
		{
			if(first[y]==0 or second[u]==0){continue;}
			else{all_num[y+u]+=first[y]*second[u];}
		}
	}
	int plus=0;
	for(int ee=2002;ee>0;ee-=1)//开始输出 
	{
		if(all_num[ee]==0){continue;}
		else if(all_num[ee]<0)
		{
			std::cout<<all_num[ee]<<"x^"<<ee;
			plus=1;
		}
		else
		{
			if(plus==0)
			{
				std::cout<<all_num[ee]<<"x^"<<ee;
				plus=1;
			}
			else{std::cout<<"+"<<all_num[ee]<<"x^"<<ee;}
		}
	}
	if(all_num[0]>0){std::cout<<"+"<<all_num[0];}
	else if(all_num[0]<0){std::cout<<"-"<<all_num[0];}
	else{std::cout<<"";}
	return 0;
}