<https://s.mj.run/AOw7JOgkJo8> Please refer to the style of this picture and design a few similar black and white line drawings for creative math drawings for primary school students to fill in, and add some math formulas within 50 to the pictures.Make sure the images in the picture are close to reality, not abstract, and suitable for the aesthetic level of primary school students.--ar 4:3  --ar 4:5