Can someone help me please dont understand at all

Thanx
Edgar



Compute

(a) integral over (curly) db(0,2) of
1/(z−1)^2(z^2+1) dz

(b) Integral over gamma of e^iz/z^6+1 dz

where gamma is the half-circle [−R,R] union {Re^itheta : 0 < theta <pi},
and R > 1


(c)integral over (curly)db(0,8) of
1/1+e^z dz