The second formula cannot be right because it does not even make sense mathematically: The scalar product $v \cdot w$ produces a number. This means that $u \times (v \cdot w)$ cannot be computed. The cross product is only defined between two vectors!
The second formula cannot be right because it does not even make sense mathematically: The scalar product $v \cdot w$ produces a number. This means that $u \times (v \cdot w)$ cannot be computed. The cross product is only defined between two vectors!