Equation Icon  ( ) α 1 γ′ α α′ 1 α δ′ 2 U β′;γ = 2g γ g α′R β′γ′δ′ − 3g β′R γ′δ′ σ + 𝒪 (λ ), (324 ) ( ) α 1- α α′ 1- α δ′ 2 U β′;γ′ = 2 g α′R β′γ′δ′ + 3 gβ′R γ′δ′ σ + 𝒪 (λ ), (325 )