y1, y2, y3, x1, x2, x3, a, b, g, 
-x1^3+6*g*x1-3*g*x2-3*g*x3+3*x1-3*y1
-b*y1+a+x1
-x2^3-3*g*x1+6*g*x2-3*g*x3+3*x2-3*y2
-b*y2+a+x2
-x3^3-3*g*x1-3*g*x2+6*g*x3+3*x3-3*y3
-b*y3+a+x3
