Phương pháp số lần II - 07XD

07XD1: http://www.mediafire.com/?cth24dr9gyyl0fj
07XD2: http://www.mediafire.com/?2h9ql0nubfa5s5n
07XD3: http://www.mediafire.com/?6weav9ux05mz6tr
07XD4: http://www.mediafire.com/?7nuxkm4lcy47oxj
07XD5: http://www.mediafire.com/?71w54x2e6t61e1d
07XD6: http://www.mediafire.com/?ht6qgyzhlbypbzn