Easy, select the emails you want to restore in the 'Deleted' folder by clicking on the check box next to each email. Be sure a check mark appears next to each email you want to restore.
Then click on the 'Move to' item on the menu across the top of the page. A menu will drop down. Click on 'Inbox' option from the drop down menu and the selected email(s) will be moved back into your inbox. Hope this helps!