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If vec(a) = 2 hat(i) - hat(j) + hat(k) a...

If `vec(a) = 2 hat(i) - hat(j) + hat(k) and vec(c) = - hat(i) + 3 hat(j) + hat(k)`, then `vec(a) . (vec(c) xx vec(a))` is 2.

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