ring R = 0, (x1, x2), lp;
int noVars = 0;
poly p =
 -x1*x2^2
 +x1*x2^5
 +0*x2^9
 +0*x2^7
 -x2^3
 +x2^4
 +x2^6
 +0*x1*x2^8
 -x2;