C++ :

#include<bits/stdc++.h>
using namespace std;
int g,x,y;
string a,b;
int main()
{
	cin>>g;
	while(g--)
	{
		cin>>a>>x>>b>>y;
		int as=a.size(),bs=b.size();
		if(as+x==bs+y)
		{
			if(as>bs) 
				for(int i=0;i<as-bs;i++)
					b+='0';
			else if(as<=bs)
				for(int i=0;i<bs-as;i++)
					a+='0';
			if(a>b) cout<<'>'<<endl;
			else if(a<b) cout<<'<'<<endl;
				else cout<<'='<<endl; 
		}
		else if(as+x>bs+y) cout<<'>'<<endl;
			else cout<<'<'<<endl;
	}
    return 0;
}