{{b[1], b[2], b[2], b[1] - 4*b[2]}, {-b[1], b[1] - 6*b[2], 2*b[2], 2*b[2]}, {-b[2], -b[2], (3*b[1])/2 - (9*b[2])/2, b[1]/2 + (5*b[2])/2}, {-b[1] + 4*b[2], -b[1] + 6*b[2], (-3*b[1])/2 + (17*b[2])/2, -1/2*b[1] + (7*b[2])/2}, {(-3*b[1])/2 + (9*b[2])/2, (3*b[1])/2 - (17*b[2])/2, -1/2*b[1] + (9*b[2])/2, -1/2*b[1] + (9*b[2])/2}, {b[1]/2 - (9*b[2])/2, b[1]/2 - (9*b[2])/2, -1/2*b[1] + (5*b[2])/2, -1/2*b[1] + (5*b[2])/2}, {-1/2*b[1] - (5*b[2])/2, b[1]/2 - (5*b[2])/2, b[1]/2 - (5*b[2])/2, b[1]/2 - (3*b[2])/2}, {-2*b[2], -2*b[2], b[1]/2 - (7*b[2])/2, -1/2*b[1] + (3*b[2])/2}}