Equation Icon  [ ] [ ( ) ] 0 α a 1 2 3 1 2 1 2 3 a eα dx = 1 + raaΩ + 2r S + 𝒪(r ) du + 1 + 6-r S Ωa − 6r Sa + 𝒪 (r ) dˆx , (169 ) [ ] [ ] a α ( a a b) 1- 2 a 3 a 1- 2 a 1- 2 a 3 b eα dx = r a − ω bΩ + 2r S + 𝒪 (r ) du + δb − 6 r S b + 6 r S Ωb + 𝒪 (r ) dˆx . (170 )