What is the answer to this please help

Answer:
[tex]2\sqrt{42} + 7\sqrt{2} -6- \sqrt{21}[/tex]
Step-by-step explanation:
[tex](\sqrt{14} - \sqrt{3})(\sqrt{12} + \sqrt{7})[/tex]
root 12 can be changed to 2 root 3
then multiply
then simply
and you should get ur answer