Precalculus-------Give an example of three functions f,g,h none of which is a constant function such that?

Precalculus-------Give an example of three functions f,g,h none of which is a constant function such that?
foh=goh but f is not equal to g
I tried with many functions but not getting like
f=x
g=1+x^2
then h=?or any other example so that we get foh=goh

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