Bi⁡(z)=ⅇ-π⁢ⅈ/6⁢Ai⁡(z⁢ⅇ-2⁢π⁢ⅈ/3)+ⅇπ⁢ⅈ/6⁢Ai⁡(z⁢ⅇ2⁢π⁢ⅈ/3).