Word Count : 128

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The integral is [ \oint_C \frac{dz}{z^2 + 1}, ] where (C) is (|z| = 4). Factor the denominator: [ z^2 + _________ ________ _______ __________ __________ ________ ______ _____ ___ ____.
___ ___ __________ __________ ________.
______ ___ _____ ____ ____ _____ _____.
____ __________ ___ ______ ____ _________ ______ _____ ______.
_____ ___ ______ ___ _______ _____ ______ _______ ____ _______.
_________ _________ ____ ________ _________ ____ ______ ______ _________ _______.
___ __________ ________ ________ ________ _______ ____ _______.
____ ___ _________ __________ ____ ________ ______ __________.
____ ___ ________ ________ _______ __________ ______ __________.
________ ______ ______ ________ __________ ______ _______ _____.
__________ _________ _____ _______ ___ _________ __________ _____ _________ _____ ____ ________.
____ __________ _______ ___ ____ ___ _________.
__________ ____ ____ ___ __________.
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