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# Long description

This figure shows a diagram of the complex plane with the axes unlabelled and concentrated in the upper-right quadrant. The following points are labelled: zero, 1 and 1 plus i. A contour is made up of two line segments and labelled capital gamma. The first from zero to point 1 is marked with an arrow from left to right and the second from point 1 to 1 plus i is marked with an arrow in an upwards direction.