Matrix t*K(1) in Subspace 43 with Dimension 3

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

(-I)*Sqrt[3]*t (I*(3*I + Sqrt[3])*t)/Sqrt[2] U
((3 + I*Sqrt[3])*t)/Sqrt[2] 0 ((1 - I*Sqrt[3])*U)/Sqrt[2]
-U ((-1 - I*Sqrt[3])*U)/Sqrt[2] I*Sqrt[3]*t