w, z, y, x, c, b, a, C1, B1, A1, 
-a^4*b^4*c^4+a^4*b^4*z^4+a^4*c^4*y^4+b^4*c^4*x^4
-A1*a^4+a^4*x+2*w*x^3
-B1*b^4+b^4*y+2*w*y^3
-C1*c^4+c^4*z+2*w*z^3
