Matrix t*K(1) in Subspace 99 with Dimension 3

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

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