Question: Use the theorem in Sec. 71, involving a single residue, to evaluate the integral of each of these functions around the circle |z| = 2

Use the theorem in Sec. 71, involving a single residue, to evaluate the integral of each of these functions around the circle |z| = 2 in the positive sense:
(a) z5 / 1 - z3;
(b) 1 / 1 + z2;
(c) 1 / z.

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