User-agent: Googlebot
Disallow: /wp-feed.php
Disallow: /wp-register.php
Disallow: /wp-login.php
Disallow: /wp-admin

User-agent: *
Disallow: /wp-feed.php
Disallow: /wp-register.php
Disallow: /wp-login.php
Disallow: /wp-trackback.php
Disallow: /wp-admin/