Equation Icon  ( ) ai = − m2-ni + ε2m2- − v2ni + 4m2-ni + 4(⃗n ⋅⃗v )vi 1 r212 12 r212 1 12 r12 12 12 1 1 m2 ( m ) + ε4--2 2(⃗n12 ⋅⃗v1)2ni12 − 9-2 ni12 − 2 (⃗n12 ⋅⃗v1)vi1 r312 r12 6m32( 3 i 16m2 i i) 7 + ε -4- − (⃗n12 ⋅⃗v1) n12 + -----n 12 + 4(⃗n12 ⋅⃗v1)v1 + 𝒪 (ε ) (182 ) r12 r12