Equation Icon  AB′ 1 5 a bc d A- B′ 4 6 e a b cd A-B-′ 7 P𝒮r = 10G-r T bcdt tt ℰA ¯ℰA′ + 45G-r t (∇eT bcd)t tt ℰA ¯ℰA′ + 𝒪 (r ). (8.5 )