Matrix t2*K(2) in Subspace 22 with Dimension 10

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

(-15*t*U)/2 -2*t*U 0 (-3*t*U)/2 (-3*t*U)/Sqrt[2] 0 0 (-5*t*U)/2 ((33*Sqrt[4 - 4*Sqrt[2/11]] + 10*Sqrt[121 - 11*Sqrt[22]] - 22*Sqrt[22 - 2*Sqrt[22]])*U^2)/(44*Sqrt[52 - 8*Sqrt[22]]) ((1001*Sqrt[2 + 2*Sqrt[2/11]] + Sqrt[11 + Sqrt[22]]*(264 + 5*Sqrt[22]))*U^2)/(528*Sqrt[26 + 4*Sqrt[22]])
-2*t*U -5*t*U 0 t*U -(Sqrt[2]*t*U) 0 0 -2*t*U -((44*Sqrt[4 - 4*Sqrt[2/11]] + Sqrt[484 - 44*Sqrt[22]] + 38*Sqrt[121 - 11*Sqrt[22]])*U^2)/(88*Sqrt[52 - 8*Sqrt[22]]) -((253*Sqrt[2 + 2*Sqrt[2/11]] + Sqrt[22*(11 + Sqrt[22])])*U^2)/(88*Sqrt[26 + 4*Sqrt[22]])
0 0 -5*t*U (4*t^2 + U^2)/Sqrt[2] 0 t*U 0 -2*Sqrt[2]*t^2 -((99*Sqrt[2 - 2*Sqrt[2/11]] + 3*Sqrt[242 - 22*Sqrt[22]] + 11*(Sqrt[44 - 4*Sqrt[22]] + 4*Sqrt[11 - Sqrt[22]]))*t*U)/(66*Sqrt[52 - 8*Sqrt[22]]) ((-517*Sqrt[4 + 4*Sqrt[2/11]] + 2*(132*Sqrt[2] - Sqrt[11])*Sqrt[11 + Sqrt[22]])*t*U)/(528*Sqrt[26 + 4*Sqrt[22]])
(-3*t*U)/2 t*U (4*t^2 + U^2)/Sqrt[2] (-9*t*U)/2 (-3*t*U)/Sqrt[2] -2*Sqrt[2]*t^2 0 -(t*U)/2 (4*(-11 + Sqrt[22])*t^2)/(11*Sqrt[2 - 2*Sqrt[2/11]]) (4*(11 + Sqrt[22])*t^2)/(11*Sqrt[2 + 2*Sqrt[2/11]])
(-3*t*U)/Sqrt[2] -(Sqrt[2]*t*U) 0 (-3*t*U)/Sqrt[2] -6*t*U -U^2 Sqrt[2]*U^2 -((t*U)/Sqrt[2]) 0 0
0 0 t*U -2*Sqrt[2]*t^2 -U^2 0 2*Sqrt[2]*t*U 2*Sqrt[2]*t^2 -((33*Sqrt[2 - 2*Sqrt[2/11]] + Sqrt[242 - 22*Sqrt[22]] + 22*Sqrt[11 - Sqrt[22]])*t*U)/(11*Sqrt[52 - 8*Sqrt[22]]) ((-517*Sqrt[4 + 4*Sqrt[2/11]] + 2*(132*Sqrt[2] - Sqrt[11])*Sqrt[11 + Sqrt[22]])*t*U)/(264*Sqrt[26 + 4*Sqrt[22]])
0 0 0 0 Sqrt[2]*U^2 2*Sqrt[2]*t*U -4*t*U 0 -((11*Sqrt[4 - 4*Sqrt[2/11]] + 14*Sqrt[121 - 11*Sqrt[22]] - 22*Sqrt[22 - 2*Sqrt[22]])*t*U)/(22*Sqrt[52 - 8*Sqrt[22]]) -((209*Sqrt[2 + 2*Sqrt[2/11]] + Sqrt[11 + Sqrt[22]]*(66 + 5*Sqrt[22]))*t*U)/(66*Sqrt[26 + 4*Sqrt[22]])
(-5*t*U)/2 -2*t*U -2*Sqrt[2]*t^2 -(t*U)/2 -((t*U)/Sqrt[2]) 2*Sqrt[2]*t^2 0 (-11*t*U)/2 ((-32*Sqrt[121 - 11*Sqrt[22]] + 176*Sqrt[22 - 2*Sqrt[22]])*t^2 + (33*Sqrt[4 - 4*Sqrt[2/11]] + 2*Sqrt[121 - 11*Sqrt[22]] + 22*Sqrt[22 - 2*Sqrt[22]])*U^2)/(44*Sqrt[52 - 8*Sqrt[22]]) (-2112*(Sqrt[2 + 2*Sqrt[2/11]] + Sqrt[11 + Sqrt[22]])*t^2 + (517*Sqrt[2 + 2*Sqrt[2/11]] + (-264 + Sqrt[22])*Sqrt[11 + Sqrt[22]])*U^2)/(528*Sqrt[26 + 4*Sqrt[22]])
((33*Sqrt[4 - 4*Sqrt[2/11]] + 10*Sqrt[121 - 11*Sqrt[22]] - 22*Sqrt[22 - 2*Sqrt[22]])*U^2)/(44*Sqrt[52 - 8*Sqrt[22]]) -((11*Sqrt[4 - 4*Sqrt[2/11]] + 10*Sqrt[121 - 11*Sqrt[22]])*U^2)/(22*Sqrt[52 - 8*Sqrt[22]]) -((99*Sqrt[2 - 2*Sqrt[2/11]] + 3*Sqrt[242 - 22*Sqrt[22]] + 11*(Sqrt[44 - 4*Sqrt[22]] + 4*Sqrt[11 - Sqrt[22]]))*t*U)/(66*Sqrt[52 - 8*Sqrt[22]]) ((-4 + 4*Sqrt[2/11])*t^2)/Sqrt[2 - 2*Sqrt[2/11]] 0 -((33*Sqrt[2 - 2*Sqrt[2/11]] + Sqrt[242 - 22*Sqrt[22]] + 22*Sqrt[11 - Sqrt[22]])*t*U)/(11*Sqrt[52 - 8*Sqrt[22]]) -((11*Sqrt[4 - 4*Sqrt[2/11]] + 14*Sqrt[121 - 11*Sqrt[22]] - 22*Sqrt[22 - 2*Sqrt[22]])*t*U)/(22*Sqrt[52 - 8*Sqrt[22]]) ((-32*Sqrt[121 - 11*Sqrt[22]] + 176*Sqrt[22 - 2*Sqrt[22]])*t^2 + (33*Sqrt[4 - 4*Sqrt[2/11]] + 2*Sqrt[121 - 11*Sqrt[22]] + 22*Sqrt[22 - 2*Sqrt[22]])*U^2)/(44*Sqrt[52 - 8*Sqrt[22]]) (3*(17842*Sqrt[2] - 3370*Sqrt[11] - 4015*Sqrt[52 - 8*Sqrt[22]])*t*U)/(16*Sqrt[52 - 8*Sqrt[22]]*(-11 + Sqrt[22])^2) -((69*Sqrt[11] - 121*Sqrt[(11 + Sqrt[22])/(11 - Sqrt[22])] + 11*Sqrt[(22*(11 + Sqrt[22]))/(11 - Sqrt[22])])*t*U)/528
((1001*Sqrt[2 + 2*Sqrt[2/11]] + Sqrt[11 + Sqrt[22]]*(264 + 5*Sqrt[22]))*U^2)/(528*Sqrt[26 + 4*Sqrt[22]]) -((913*Sqrt[2 + 2*Sqrt[2/11]] + 61*Sqrt[22*(11 + Sqrt[22])])*U^2)/(528*Sqrt[26 + 4*Sqrt[22]]) ((-517*Sqrt[4 + 4*Sqrt[2/11]] + 2*(132*Sqrt[2] - Sqrt[11])*Sqrt[11 + Sqrt[22]])*t*U)/(528*Sqrt[26 + 4*Sqrt[22]]) ((4 + 4*Sqrt[2/11])*t^2)/Sqrt[2 + 2*Sqrt[2/11]] 0 ((-517*Sqrt[4 + 4*Sqrt[2/11]] + 2*(132*Sqrt[2] - Sqrt[11])*Sqrt[11 + Sqrt[22]])*t*U)/(264*Sqrt[26 + 4*Sqrt[22]]) -((209*Sqrt[2 + 2*Sqrt[2/11]] + Sqrt[11 + Sqrt[22]]*(66 + 5*Sqrt[22]))*t*U)/(66*Sqrt[26 + 4*Sqrt[22]]) (-2112*(Sqrt[2 + 2*Sqrt[2/11]] + Sqrt[11 + Sqrt[22]])*t^2 + (517*Sqrt[2 + 2*Sqrt[2/11]] + (-264 + Sqrt[22])*Sqrt[11 + Sqrt[22]])*U^2)/(528*Sqrt[26 + 4*Sqrt[22]]) -((69*Sqrt[11] - 121*Sqrt[(11 + Sqrt[22])/(11 - Sqrt[22])] + 11*Sqrt[(22*(11 + Sqrt[22]))/(11 - Sqrt[22])])*t*U)/528 (-9*(86 + 7*Sqrt[22] + 24*Sqrt[26 + 4*Sqrt[22]])*t*U)/(4*Sqrt[2 + 2*Sqrt[2/11]]*(11 + Sqrt[22])^(3/2))