(12⁢p-ℓ+12)⁢ξ⁢B2⁢ℓ-1+((2⁢ℓ+1)2-η)⁢B2⁢ℓ+1+(12⁢p+ℓ+32)⁢ξ⁢B2⁢ℓ+3=0,