Help with #6! Please! I don’t get it at all and I just need the answer please!!!

Answer:
d. [tex]\sqrt{5}-\sqrt{11}[/tex]
e. [tex]9 + \sqrt{11}[/tex]
f. [tex]\sqrt[3]{3} - 1.5[/tex]
Step-by-step explanation:
Change the addition signs to subtraction signs and visa versa.