You might want to review the sql insert syntax. You want something like
"insert into news
(post,title,date,user,content)
values (... AS YOU POSTED ...)"
No 's around table and column names.
I didn't actually test your values syntax. Might be easier if you did something like
$content = $_POST['content'];
And then use $content in the query. You will end up having to clean it anyways.