Get pagination working for custom loops within page templates

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By seeing your code, you are creating the $args array but not passing it to the WP_Query. Try using the below way.

$args = array(
     'posts_per_page' => 7,
      'offset'    => '5',
      'paged' => $paged
 ) ;
$my_query =new WP_Query($args);
......