∫zn+3⁢w⁡(z)⁢ⅆ⁡z=zn+2⁢w′⁡(z)-(n+2)⁢zn+1⁢w⁡(z)+(n+1)⁢(n+2)⁢∫zn⁢w⁡(z)⁢ⅆ⁡z,