[Math] Prove this vector identity using vector identities

Question

Let $f$, $g$ and $h$ be any $C^{2}$ scalar functions. Using the standard identities of vector calculus, prove that;

$$ \nabla \cdot \left( f\nabla g \times \nabla h \right) = \nabla f \cdot \left(\nabla g \times \nabla h \right)$$

Here is my working out so far;
using identity 8
$$ \nabla \cdot \left( f\nabla g \times \nabla h \right) = \nabla h \cdot \left(\nabla \times f\nabla h \right) – f\nabla g \cdot \left( \nabla \cdot \nabla h \right) $$ and the div of a scalar is a vector hence $$ = \overrightarrow H \cdot \left(\nabla \times f\nabla \overrightarrow G \right) – f\nabla \overrightarrow G \cdot \left( \nabla \cdot \overrightarrow H \right) $$ and then using vector identity 10 gives me $$= \overrightarrow H \cdot \left(f\nabla \times \overrightarrow G +\nabla f \times \overrightarrow G\right) – f\nabla \overrightarrow G \cdot \left( \nabla \cdot \overrightarrow H \right) $$ and now I don't know whats next?

Here are the vector identities listed below

Answer 1

HINT: Use identity 7 with $\mathbf{F}=\nabla g\times\nabla h$.