Calculate the line integral , F · dr, where C is the straight-line path from (2,0) to (0,2), followed by the straight-line path from (0,2) to (0,0), and F is the vector field F (x, y) =< xy + 1, x² + 2y >. Use these parametrizations for the two line segments: ri (t) =< 2 – t, t >, r2 (t) =< 0, 2 – t >, 0

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