j=[(2*d)/3 (2*d)/3 (2*d)/3 -(2*cos((x +z)/4)) 0 0 -(2*cos((y +z)/4)) 0 0 -(2*cos((x +y)/4)) 0 0; (2*d)/3 (2*d)/3 (2*d)/3 0 -(2*cos((x +z)/4)) 0 0 -(2*cos((y +z)/4)) 0 0 -(2*cos((x +y)/4)) 0; (2*d)/3 (2*d)/3 (2*d)/3 0 0 -(2*cos((x +z)/4)) 0 0 -(2*cos((y +z)/4)) 0 0 -(2*cos((x +y)/4)); -(2*cos((x +z)/4)) 0 0 (2*d)/3 -(2*d)/3 -(2*d)/3 -(2*cos((x -y)/4)) 0 0 -(2*cos((y-z)/4)) 0 0; 0 -(2*cos((x +z)/4)) 0 -(2*d)/3 (2*d)/3 (2*d)/3 0 -(2*cos((x -y)/4)) 0 0 -(2*cos((y-z)/4)) 0; 0 0 -(2*cos((x +z)/4)) -(2*d)/3 (2*d)/3 (2*d)/3 0 0 -(2*cos((x -y)/4)) 0 0 -(2*cos((y-z)/4)); -(2*cos((y +z)/4)) 0 0 -(2*cos((x -y)/4)) 0 0 (2*d)/3 -(2*d)/3 (2*d)/3 -(2*cos((x-z)/4)) 0 0; 0 -(2*cos((y +z)/4)) 0 0 -(2*cos((x -y)/4)) 0 -(2*d)/3 (2*d)/3 -(2*d)/3 0 -(2*cos((x-z)/4)) 0; 0 0 -(2*cos((y +z)/4)) 0 0 -(2*cos((x -y)/4)) (2*d)/3 -(2*d)/3 (2*d)/3 0 0 -(2*cos((x-z)/4)); -(2*cos((x +y)/4)) 0 0 -(2*cos((y-z)/4)) 0 0 -(2*cos((x-z)/4)) 0 0 (2*d)/3 (2*d)/3 -(2*d)/3; 0 -(2*cos((x +y)/4)) 0 0 -(2*cos((y-z)/4)) 0 0 -(2*cos((x-z)/4)) 0 +(2*d)/3 (2*d)/3 -(2*d)/3; 0 0 -(2*cos((x +y)/4)) 0 0 -(2*cos((y-z)/4)) 0 0 -(2*cos((x-z)/4)) -(2*d)/3 -(2*d)/3 (2*d)/3;];