Answer
$13\sqrt{2}-\sqrt{6}$.
Work Step by Step
The given expression is
$=3\sqrt{2}-\sqrt{6}+10\sqrt{2}$
Use commutative property of addition.
$=3\sqrt{2}+10\sqrt{2}-\sqrt{6}$
Use distributive property.
$=(3+10)\sqrt{2}-\sqrt{6}$
Add.
$=13\sqrt{2}-\sqrt{6}$.
