Use Theorem 6 to evaluate the integral along the curve .

Theorem 6: (Integration of Functions that are the Derivatives of Analytic Functions)

LetF(z)be analytic in a domainD, LetdF/dz=f(z)inD. Then, ifz1 andz2 are inD, , where the integration can be performed along any contour in D that connectsz1 andz2.