Strip HTML Tags but Keep adsense/ infolinks /other scripts

Hi!
I had worst complains but HTML which run in my posts and damage the template of blog. I search about to strip HTML tags I got following code
that put in single.php of theme.

<?php
ob_start();
 the_content(''.__('Read more <span class="meta-nav">?</span>', 'sandbox').'');
$old_content = ob_get_clean();
$new_content = strip_tags($old_content, '<p><a><b><br /><input><form><img><textarea><li><ol><ul><table>');
echo $new_content;
?>

I get this code from https://www.ads-software.com/support/topic/way-to-strip-html-from-the_content-1?replies=6
This work fine for me but remove ad sense / other scripts that are present in posts. I search about this but no clue find.
please help me