2 Evaluate the following integrals, the contour C being taken in counter-cbckwise sense 22 +1 (a) Rz+1) dz; C: |2| =1 dz; C: |2| =3 (b) ¿(z-1)(z- 2) cOS RZ () dz, Cthe rectangle with vertices 2ti, -2ti

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