I have to take the partial differentiation of an unknown function.
For example, take the unknown function to be $g(x)$. Then it's derivative w.r.t $x$ is $g'(x)$.

By default, *Mathematica* differentiates the function. I want to keep the result of differentiation as $d(g(x))$ and not $g'(x)$. Is there any way to achieve this?

More precisely, I am using `Conjugate[g[x]]` as the unknown function and I want the output should be displayed only as `d[Conjugate[g[x]]` and not as `Conjugate'[x]g'[x]`.

Also, can I handle the conjugate more efficiently than just carrying it all along in the code?