Locate each of the isolated singularities of the given function and tell whether it is a removable singularity, a pole, or an essential singularity. If the singularity is removable, give the vlaue of the function at the point; if the singularity is a pole, give the order of the pole.

(1)

(2)

(3)

If anyone could show me how to do any of these, I would appreciate it. I don't understand it..Thanks!