Answer
The answer is $-\sqrt6$.
Work Step by Step
We can simplify the expression as follows:
$=(\sqrt6+\sqrt3)(\sqrt2-2)$
$=\sqrt6*\sqrt2-\sqrt6*2+\sqrt3*\sqrt2-\sqrt3*2$
$=\sqrt12-2\sqrt6+\sqrt6-2\sqrt3$
$=(\sqrt4*\sqrt3)-\sqrt6-2\sqrt3$
$=2\sqrt3-\sqrt6-2\sqrt3$
$=-\sqrt6$.
