g(x,y)=1-0.125219*y +0.000394*y^2-0.194676*x-0.005005*x*y-
0.000011*x*y^2-0.914763*(x^2)+0.005888*(x^2)*y+
0.000008*(x^2)*y^2-0.036937*(x^3)-0.000160*(x^3)*y+
0.021995*x^4+0.000058*(x^4)*y-0.000591*x^5+
0.000003*(x^5)*y +0.000140*x^6-0.000002*(x^6)*y+
0.000008*x^7-0.000005*x^8

f(x,y)=1-2.055648*y+0.119783*y^2-0.000724*y^3+
4.790122*x+0.320433*x*y+0.008078*x*y^2-0.000010*x*y^3-
14.863762*x^2+1.765345*(x^2)*y-0.015898*(x^2)*y^2+
0.000014*(x^2)*y^3+2.340180*x^3+0.118352*(x^3)*y-
0.000220*(x^3)*y^2-0.000004*(x^3)*y^3+6.505040*x^4-
0.116336*(x^4)*y+0.000171*(x^4)*y^2+0.000003*(x^4)*y^3+
0.433469*x^5-0.001676*(x^5)*y-0.000039*(x^5)*y^2-
0.283749*x^6+0.000923*(x^6)*y+0.000020*(x^6)*y^2-
0.004248*x^7-0.000194*(x^7)*y+0.001855*x^8+
0.000075*(x^8)*y-0.000358*x^9+0.000002*(x^9)*y+
0.000111*x^10-0.000002*(x^10)*y+0.000003*x^11-0.000002*x^12