(a) Uniqueness, prove that the Laurent expansion of a given analytic function in a given annulus is unique.(b) Accumulation of singularities, does tan (1/z) have a Laurent series that converges in a region 0 > |z| (c) Integrals expand the following function in a Laurent series that converges for |z| >0.

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1 2 et - 1 t dr. 1 Š sin t t dt.