How to cause noun-form integral to be evaluated?

Hello,

After some manipulations I got a noun-form integral,
and I can't figure out how to get it evaluated.
I have verified that Maxima can indeed carry out the 
integration symbolically.

The problem is similar to this:

 (C1) i:'integrate(x^2,x,0,1)/h$

The only way that I've found to cause evaluation is this:

 (C2) apply('integrate,args(args(i)[1]));

 (D2) 1/3

but there must be a simpler, more general way.

I tried ev(i); eval(i); ''i; apply_nouns(i); and some others,
and those all yield the noun form. I have RTFM and 
searched the mailing list archives. Yes, I am grasping 
at straws & shooting in the dark.

apply_nouns, from its description, would seem to be 
just the right thing. However, it has no implementation,
as noted in bug report #711539. It must have existed at
some time -- can we recover it?

Any advice you might have will be appreciated.
I must be overlooking something very simple.

Robert Dodier

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