Evaluate the line integral of the vector field with components P(x, y) = sqrt(x^2 + y^2) (along dx) ...

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Evaluate the line integral of the vector field with components P(x, y) = sqrt(x^2 + y^2) (along dx) and Q(x, y) = y(xy + log(x + sqrt(x^2 + y^2))) (along dy), over the oriented curve C in R^2 that goes from (pi, 0) to (2 pi, 0) along a straight line, and then goes from (2 pi, 0) to (pi, 0) along the curve y = sin(x).