Could people please tell me some of the more common ways to place/paste images, rather than links to images, in an answer on Main? Last night I requested an image from Joseph O'Rourke, who is a helpful fellow. I ran the mouse from corner to corner, then pasted that into an answer box for a big number that is obviously prime? . The result is not the image, rather a big URL that appears to have something to do with the nature of the image as an email attachment. If you (I) click on it, the image does appear as I want it.
The more intricate item was several days ago, Another quadratic Diophantine equation: How do I proceed? where I had deleted my answer owing to the OP considering it too difficult and worthless and me not wanting to deal with that. I got email from a moderator saying there had been a request for re-instatement. I realized the one chance for it to make sense was to draw the diagram myself, so I scanned it in and asked Joseph to place my diagram in the middle of my answer, which he did very well. With the diagram, my answer is not over anyone's head.
I will read some of the "Similar Questions" I currently see as links on the right side of my screen. If someone could fix the image at Another quadratic Diophantine equation: How do I proceed? that would be great, although I ought also to learn how to do this. After all, "Give a man a fire and he's warm for a night. Set fire to him and he's warm for the rest of his life."