You cannot delete a post. If you send me a link for which you want to delete, I can do that.

For images, you can edit that. Click edit post, then Go Advanced, and scroll down to where there's Manage Attachments, click there, and then you can remove or add images.

To remove an image, on the bottom where the images are in Manage Attachments, click on the X in the upper right of an image to remove a current image. Then done or the X on the Manage Attachments window.