Can someone make a step by step analysis because i just dont get these questions.

(3/7) ^2 simplify

9a3b5/-3ab2 simplify

(14ab)0 simplify

solve for w
w/4 =- 8

solve for c
3c =-18

solve for k
44 = k -7

you don't have to do all of them but i really need step by steo , you!

( fog ) ( 4 ) = 45

Step-by-step explanation:

Given function are f(x) = 4x + 1

and g(x) = x² - 5

We have to find the value of ( fog ) (4)

Since ( fog ) (x) = f [g(x)]

= 4 (x² - 5) + 1

= 4x² - 20 + 1

= 4x² - 19

Now ( fog ) (4) = 4(4)² - 19

                       = 4 × 16 - 19

                       = 64 - 19

                       = 45

( fog ) ( 4 ) = 45 is the answer.