The previous page is sending you to http://74.125.47.132/search?q=cache:qj-geLKXi5oJ:www.escolar.com/matem/25potenc.htm+http://www.escolar.com/matem/25potenc.htm&cd=1&hl=es&ct=clnk&gl=co.

 If you do not want to visit that page, you can return to the previous page.