php - redirect user from sudirectory to main directory -

i need 301 redirect urls this:

example.com/exam/anything example.com/anything

my current .htaccess file

  rewriteengine on     rewritecond %{request_filename} !-f     rewritecond %{request_filename} !-d     rewriterule ^(.*)$ /admin/index.php?$1 [l]

i not know how work

try,

rewriteengine on rewriterule ^exam/(.*)$ /$1 [l]

SoEM