Find the value of the line integral

If F is conservative, the integration may be easier on an alternative path.)

F(x, y, z) = (2y + x)i + (x² − z)j + (2y - 4z)k 

(a) r₁(t) = ti + t²j+ k, 0 ≤ t ≤1

(b) r₂(t) = ti + tj + (2t - 1)²k, 0 ≤ t ≤ 1

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C F. dr.