You would click on the yellowish triangle that is located on the lower left hand side of the post. Once you click on the triangle, you will be taken to a screen where you can report issues or make requests. Once you are taken to the screen, type your request to have the post deleted. The moderation team will review your request and make the final decision on whether the post is deleted.
Be sure to click the triangle that appears within the post that you would like to see deleted so we'll know which post to address.