How do you simplify (4-sqrt3)(12 + 5 sqrt3)?

$\left(4 \cdot 12\right) + \left(4 \cdot 5 \sqrt{3}\right) + \left(- \sqrt{3} \cdot 12\right) + \left(- \sqrt{3} \cdot 5 \sqrt{3}\right) =$
$= 48 + 20 \sqrt{3} - 12 \sqrt{3} - 15 =$
$= 33 + 8 \sqrt{3}$