I only want the "facebook and the twitter widget", not the rest, how can I do it please?

Hi Laura - after you add the social widget to your page, you can disable the Google+ widget and just leave the Facebook and Twitter ones. After you disable Google+, you’ll need to adjust the size of the social widget slightly to close the empty space, and you’ll be all set. I made a quick screencast showing what I mean: http://screencast.com/t/sEoSqps2ll