In a problem like this, simply do a find and replace with the x into whatever the function is. In this case, every time you see an *, replace whatever is under it with the x in the given function. Since this one is nested in two sets of parenthesis, let's do the inside set first.
The insidemost function is π*, so we should replace the x in the given function with π. Thus, we get:
π/π = 1
Now, the outermost function is whatever result we got from the last function. So we have 1*. Repeat:
π/1 = π
So the answer is C.
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