PLZ, HELP WILL GIVE BRAINLIEST IF CORRECT! plz help or I won't get my tv or phone back :'(

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]

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

What is the total area of the figure?