# Composite function: how to show function names instead of its full expression?

Suppose I define a function `f(x) = x**2`

and a function `g(y) = f(y) + 2*y`

.

When I type `show(g)`

the output is: `y**2 +2*y`

.

What should I do to have the `show`

output as `f(y) + 2*y`

instead?