Suppose that an output is
which could be obtained from, for example,
D[f[x, y, z], x] / D[h[x, y, z], x]
I'm looking for a way to show it without the square brackets.
Currently I do that by copying the output to a text editor and removing, in this case,
[x, y, z] with the Replace command, then copying the expression back to Mathematica. How to do this in Mathematica itself automatically?