redirect htaccesse

Question

DirectoryIndex index.php
<IfModule mod_rewrite.c>
RewriteEngine On
#RewriteBase /
RewriteCond %{REQUEST_URI} ^(.*)//(.*)$
RewriteRule . %1/%2 [R=301,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^.*$ index.php?qa-rewrite=$0&%{QUERY_STRING} [L]
</IfModule>

How to redirect urls

http://www.example.com/index.php/example/... to http://www.example.com/example/...

http://www.example.com/qa/example/... to http://www.example.com/example/...

and

http://www.example.com/questions/example/... to http://www.example.com/example/...