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4. Let C denote the positively oriented boundary of the square whose sides lie along the lines $x = pm 2$ and $y = pm 2$. Evaluate each of these integrals: (a) $int_C frac{e^{-z}}{z + (pi/2)} dz$ (b) $int_C frac{cos z}{z(z^2 + 16)} dz$ (c) $int_C frac{z}{2z - 5} dz$; (d) $int_C frac{cosh z}{z^5} dz$ $int_C frac{ an(z/2)}{(z - x_0)^3} dz$ ($x_0 in mathbb{R}, -2 < x_0 < 2)$.

          4. Let C denote the positively oriented boundary of the square whose sides lie
along the lines $x = pm 2$ and $y = pm 2$. Evaluate each of these integrals:
(a) $int_C frac{e^{-z}}{z + (pi/2)} dz$
(b) $int_C frac{cos z}{z(z^2 + 16)} dz$
(c) $int_C frac{z}{2z - 5} dz$;
(d) $int_C frac{cosh z}{z^5} dz$
$int_C frac{	an(z/2)}{(z - x_0)^3} dz$ ($x_0 in mathbb{R}, -2 < x_0 < 2)$.

$4. Let C denote the positively oriented boundary of the square whose sides lie along the lines x = pm 2 and y = pm 2. Evaluate each of these integrals: (a) intC frace^-zz + (pi/2) dz (b) intC fraccos zz(z^2 + 16) dz (c) intC fracz2z - 5 dz; (d) intC fraccosh zz^5 dz intC frac an(z/2)(z - x0)^3 dz (x0 in mathbbR, -2 < x0 < 2).$

Added by Amanda M.

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