:f = $(x)x*x

:$g(x)
	@x*x

|{f(5)} = {g(5)}

|{f(2)} = {g(2)}

:y = 5
:h = $(x)x*x+y

| {h(3)} == 14

y = 7

| {h(5)} == 32

:i = $y*y

| {i!} == 49