Function Notation Find x for transformed functions to be equal

Function machine relates input to output with a well defined rule. All the operations are performed in an order. Function notation is used to represent output y as g(x) for input x.
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[maxtr]

Please help me solve this the functions g(x) = 4x-5 and f(x)=x^2
please find 1) g(f(4))
2) g(f(x)) and write domain and range of them.
Thank you a lot.