Matrix t2*K(2) in Subspace 107 with Dimension 3

(K(2) is the second-order Grosse operator)

(-9*t*U)/2 (I/4)*(3*I + Sqrt[3])*U^2 (3*(I + Sqrt[3])*t*U)/(2*Sqrt[2])
(-I/4)*(-3*I + Sqrt[3])*U^2 (-3*t*U)/2 0
(3*(-I + Sqrt[3])*t*U)/(2*Sqrt[2]) 0 -3*t*U