Can someone plz help me solved this problem I need help ASAP plz help me! Will mark you as brainiest!

What is the simplified form of 7 √x • 7 √x • 7 √x • 7 √x?

Which of the following is the rational exponent expression of 6 root f

Need ! give step by step solutions on how to solve number one [tex]\frac{9-2\sqrt{3} }{12+\sqrt{3} }[/tex] number two [tex]x+4=\sqrt{13x-20}[/tex] number three (domain and range) [tex]f(x)=2\sqrt[3]{x} +1[/tex]