My notan exercises are fairly simple and this is because I have arthritis in my thumbs.
The first image (notan 1) is a simple design with cuts made into the edges of the square.
Notan 2 was designed by cutting into the corners and interesting concept which made me think bout the placement.
Notan 3 in this design I cut across the diagonal of the square and then made a wavy cut out again another interesting design.
Notan 4 I decided on a circle and just cut shapes from the sides.
Notan 5 is something I Have wanted to do so I cut a template from a magazine and have it drop out of the square.