Hello everybody!

I have some questions about copyright of images bought in Micro stock sites.
I sell and buy images.
So...

I bought few images from micro stock sites and I am ALLOWED or not?:
1. Create a website design for the client (with these stock images or mix of them)?
2. Create a greetings cards design (printed) for my client?
3. Create a big printed advertisement design which will be shown in the street for the public; or poster about exhibition in gallery?
4. Create and show in my portfolio but not resell my own designs, artworks mixed with my photos, my illustrations and stock photos and illustrations. I mean, for example, I took only some parts from stock images, for example: from photo where is cat and dog, I took only dog; from illustration where is a nice tree vector I ungrouped it and took only it's leaves.

thank you all
and sorry for my English
di22