Equation Icon  [ ] [ b a ] 1 abc 1 a1⋅⋅⋅a6 1 a|b1⋅⋅⋅b8 𝒱 (t) = Exp ha (t)K b Exp 3!𝒜abc (t)E + 6!𝒜a1 ⋅⋅⋅a6(t)E + 9!𝒜a|b1⋅⋅⋅b8(t)E + ⋅⋅⋅(9.1,17 )