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vecA = -2hati + 3hatj - 4hatk and vecB =...

`vecA = -2hati + 3hatj - 4hatk` and `vecB = 3hati - 4hatj + 5hatk` where, `hati, hatj` and `hatk` are unti vectors along x,y and axes respectively. Find `vecA + vecB`, `vecA - vecB, vecA.vecB` and `vecA xx vecB`.

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