How to delete all my photos from my iphone?

So i restored my iphone yesterday and i backed up everything because i wanted my contacts and songs and all my photos from 2-3 years ago appeared on my album about 3, 000 photos and it's taking up all my space and i can't seem to know how to delete them through itunes, doesn't give me the option.

Please help, i need to get rid of them. I'm not willing to delete 3, 000 photos one by one.lol

There should be a delete button when you are looking through your album, before you click a picture to view it fullscreen. Click that delete button and click "select all". If you select "delete" it will delete all of your pictures. If you want to save some scroll down to them and uncheck them. Then click delete.

The easiest way is to connect it to the computer, then go to my computer, then find the iphone. When open, it should show all of your pictures, and thats it. Select and delete.