Matrix t*K(1) in Subspace 149 with Dimension 3

(K(1) is the first-order Grosse operator)

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