Indeed, 4 ways to get the same result. But what's wrong with that? Is Mathematica not famous for having several ways to achieve the same end result? But with thousands of functions and more coming, it gets really crowded. especially in our limited human memory...
In[16]:= Composition[f, g, h][x]
f@*g@*h@x
RightComposition[h, g, f][x]
h /* g /* f@x
Out[16]= f[g[h[x]]]
Out[17]= f[g[h[x]]]
Out[18]= f[g[h[x]]]
Out[19]= f[g[h[x]]]
The same for RightComposition:
In[27]:= RightComposition[f, g, h][x]
f /* g /* h@x
Composition[h, g, f][x]
h@*g@*f@x
Out[27]= h[g[f[x]]]
Out[28]= h[g[f[x]]]
Out[29]= h[g[f[x]]]
Out[30]= h[g[f[x]]]
