Hi, can some one please provide me an example for each basic limit here in the photo. I can't grasp the idea with variables. Thank you!

Edit: I have an extra question, If we find a limit and we get any number except 0, So 5/0 is our limit undefined? Or must we manipulate it that we do not have a 0 on the denominator. I know that if we get 0/0 that is indeterminate form and we must manipulate the limit.