How to calculate the curl of unti vector and the expression as follows？

Question

I have a expression as follow, and how to simplify further？ and how to calculate the curl of unti vector $ \nabla \times \hat r$ in the expression , where $ \hat r=\vec r/|r| $ and $ \vec r=x\hat i+y\hat j+z\hat k. $ $$\nabla\cdot(-\hat r\times (\hat r\times \vec A))=(\hat r\times \vec A) \cdot (-\nabla \times \hat r)+\hat r\cdot((\nabla \times \hat r )\times \vec A)=?$$