Is there any shortcode for placing buttons anywhere inside page/post content?

Yes. In order to use Social Likes shortcodes on your blog, you should first enable this hidden feature on the WordPress advanced options page.

    Go to options list of your WordPress site: /wp-admin/options.php



    Find 'sociallikes_shortcode' option



    Change its value to 'enabled'. (You can then switch it back to 'disabled' if you wish to turn the shortcodes off)
    Don't forget to apply changes with 'Save Changes' button

Then, to insert Social Likes button on any position in a post, paste the following code there:

NU COPII FILE - 
Sa fac modificare aici
http://www.best-loans.co.il/wp-admin/options.php

[wp-social-likes]