Question: In each case, show that any singular point of the function is a pole. Determine the order m of each pole, and find the corresponding

In each case, show that any singular point of the function is a pole. Determine the order m of each pole, and find the corresponding residue B.
(a) z2 + 2 / z - 1;
(b) (z / 2z + 1)3;
(c) exp z / z2 + π2.

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