#### Answer

The answer is $12-8\sqrt3$.

#### Work Step by Step

We can simplify each product as follows:
$=-\sqrt12(4-2\sqrt3)$
$=-\sqrt12*4+2*\sqrt3*\sqrt12$
$=-\sqrt4*\sqrt3*4+2*\sqrt3*\sqrt4*\sqrt3$
$=-2*\sqrt3*4+2*\sqrt3*2*\sqrt3$
$=-8*\sqrt3+4*3$
$=-8\sqrt3+12$
$=12-8\sqrt3$.