Let S=S1 nn S2 nn S3, where s1={z in ...

Let `S=S_1 nn S_2 nn S_3`, where `s_1={z in C :|z|<4}, S_2={z in C :ln[(z-1+sqrt(3)i)/(1-sqrt(31))]>0} and S_3={z in C : Re z > 0}`

`(10pi)/3`

`(20pi)/3`

`(16pi)/3`

`(32pi)/3`

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