ⅇ-b⁢π⁢ⅈ⁢Γ⁡(1-b)2⁢π⁢ⅈ⁢Γ⁡(c-b)⁢∫∞(0+)tb-1⁢(t+1)a-c(t-z⁢t+1)a⁢ⅆ⁡t,