Triple Integrals Problem

[marcusnicolas1]

I use the actual symbol but here is basically what I do ..... int(int(int(r,z,0,r^2 -4)1,r,2,3)1,x,0,2pi) .... this is supposed to produce (25pi)/2. It does not work. I get error messages. I am thinking it is the way I put it together but I can not figure it out. I had another problem to use but I can not remember what it is.