Question 60846
I'm not sure if the a is within the square root or not. I will assume that it is not.

{{{sqrt(3)a (sqrt(12)a -4sqrt(3))}}}
{{{sqrt(3)a *sqrt(12)a - sqrt(3)a*4sqrt(3))}}}
{{{sqrt(36)a^2 - a*4*sqrt(9))}}}
{{{6a^2 - 12a}}}