Question 886736

hey i am just getting mad at this question and i need to know how to simplify equations like this one!!

simplify:
3sqrt726+4sqrt252-8sqrt63
<pre>
{{{3sqrt(726) + 4sqrt(252) - 8sqrt(63)}}}
{{{(3sqrt(11^2 * 6)) + (4sqrt(6^2 * 7)) + (8sqrt(3^2 * 7))}}}
{{{33sqrt(6) + 24sqrt(7) - 24sqrt(7)}}}_______{{{highlight_green(highlight_green(33sqrt(6)))}}}