Matrix t*K(1) in Subspace 147 with Dimension 14

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

((-I/2)*t)/Sqrt[3] ((13 - I*Sqrt[3])*U)/12 0 0 (Sqrt[2/3] + I/Sqrt[2])*t 0 ((3*I + Sqrt[3])*t)/(6*Sqrt[2]) -((3*I + Sqrt[3])*t)/(2*Sqrt[2]) 0 (-I + 1/Sqrt[3])*t (-(1/Sqrt[2]) + I/Sqrt[6])*t (Sqrt[2]*(1 + I*Sqrt[3])*U)/3 (-I/2 - 1/Sqrt[3])*t -((-3*I + Sqrt[3])*U)/12
(-I/12)*(-13*I + Sqrt[3])*U ((I/2)*t)/Sqrt[3] ((3*I - Sqrt[3])*t)/2 0 0 (Sqrt[2/3] - I/Sqrt[2])*t 0 0 (I*t)/Sqrt[2] -((-I + Sqrt[3])*U)/2 ((-I/3)*(-I + Sqrt[3])*U)/Sqrt[2] (-(1/Sqrt[2]) + I/Sqrt[6])*t -((3*I + Sqrt[3])*U)/4 ((-6*I + Sqrt[3])*t)/6
0 ((3*I + Sqrt[3])*t)/2 0 0 I*Sqrt[6]*U ((1 - I*Sqrt[3])*t)/Sqrt[2] 0 0 0 0 0 0 0 (-I/2)*(-I + Sqrt[3])*t
0 0 0 (-I)*Sqrt[3]*t (I/2)*(3*I + Sqrt[3])*U 0 0 0 0 0 0 0 0 0
(-Sqrt[2/3] + I/Sqrt[2])*t 0 I*Sqrt[6]*U ((3 + I*Sqrt[3])*U)/2 0 0 (-I/2)*(-I + Sqrt[3])*t (-I/2)*(-I + Sqrt[3])*t 0 0 (-I - 1/Sqrt[3])*t 0 (-I)*Sqrt[3/2]*t 0
0 -((3*I + 2*Sqrt[3])*t)/(3*Sqrt[2]) ((-1 - I*Sqrt[3])*t)/Sqrt[2] 0 0 0 (U + I*Sqrt[3]*U)/2 U t 0 0 (I + 1/Sqrt[3])*t 0 t/Sqrt[2]
-((-3*I + Sqrt[3])*t)/(6*Sqrt[2]) 0 0 0 ((1 - I*Sqrt[3])*t)/2 (I/2)*(I + Sqrt[3])*U 0 t (U + I*Sqrt[3]*U)/2 Sqrt[2]*t (I - 1/Sqrt[3])*t 0 ((I/2)*(I + Sqrt[3])*t)/Sqrt[2] 0
((-3*I + Sqrt[3])*t)/(2*Sqrt[2]) 0 0 0 ((1 - I*Sqrt[3])*t)/2 -U -t 0 (U + I*Sqrt[3]*U)/2 (I*(I + Sqrt[3])*t)/Sqrt[2] 0 0 ((I/2)*(I + Sqrt[3])*t)/Sqrt[2] 0
0 (I*t)/Sqrt[2] 0 0 0 -t (I/2)*(I + Sqrt[3])*U (I/2)*(I + Sqrt[3])*U 0 0 0 (I - Sqrt[3])*t 0 t/Sqrt[2]
(-I - 1/Sqrt[3])*t ((I + Sqrt[3])*U)/2 0 0 0 0 -(Sqrt[2]*t) ((1 + I*Sqrt[3])*t)/Sqrt[2] 0 0 -((3*I + Sqrt[3])*t)/(3*Sqrt[2]) -(((-I + Sqrt[3])*U)/Sqrt[2]) 0 ((3 + I*Sqrt[3])*U)/2
(1/Sqrt[2] + I/Sqrt[6])*t (Sqrt[2]*U - I*Sqrt[6]*U)/6 0 0 (-I + 1/Sqrt[3])*t 0 (I + 1/Sqrt[3])*t 0 0 ((-I)/Sqrt[2] + 1/Sqrt[6])*t ((-I)*t)/Sqrt[3] (U - (2*I)*Sqrt[3]*U)/3 (I/Sqrt[2] - 1/Sqrt[6])*t -((-3*I + Sqrt[3])*U)/(3*Sqrt[2])
(I/3)*Sqrt[2]*(I + Sqrt[3])*U (1/Sqrt[2] + I/Sqrt[6])*t 0 0 0 (I - 1/Sqrt[3])*t 0 0 (I + Sqrt[3])*t ((I + Sqrt[3])*U)/Sqrt[2] (-U - (2*I)*Sqrt[3]*U)/3 (I*t)/Sqrt[3] 0 ((-I)/Sqrt[2] + 1/Sqrt[6])*t
(-I/2 + 1/Sqrt[3])*t ((-3*I + Sqrt[3])*U)/4 0 0 (-I)*Sqrt[3/2]*t 0 ((Sqrt[2] + I*Sqrt[6])*t)/4 ((Sqrt[2] + I*Sqrt[6])*t)/4 0 0 (I/Sqrt[2] + 1/Sqrt[6])*t 0 (-I/2)*Sqrt[3]*t ((5 - I*Sqrt[3])*U)/4
((3*I + Sqrt[3])*U)/12 (-I - 1/(2*Sqrt[3]))*t ((1 - I*Sqrt[3])*t)/2 0 0 -(t/Sqrt[2]) 0 0 -(t/Sqrt[2]) (I/2)*(3*I + Sqrt[3])*U ((3*I + Sqrt[3])*U)/(3*Sqrt[2]) -((3*I + Sqrt[3])*t)/(3*Sqrt[2]) (-I/4)*(-5*I + Sqrt[3])*U (-I/2)*Sqrt[3]*t