https://img441.imageshack.us/img441/...at30112012.png (3)
https://img838.imageshack.us/img838/...at30112012.png (√6)
https://img28.imageshack.us/img28/3026/mat30112012.png (-1/2)
https://img138.imageshack.us/img138/...at30112012.png (2)
https://img594.imageshack.us/img594/...at30112012.png (1/2)