Shortcode or PHP inside a shortcode in Wordpress

PHP Snippet 1:

<?php echo do_shortcode('[su_accordion]
[su_spoiler title="Feature Locations" style="fancy"]'. build_i_world_map(1) .'
[/su_spoiler]
[/su_accordion]'); ?>

PHP Snippet 2:

<?php echo do_shortcode("[show-map id='1']"); ?>

PHP Snippet 3:

<?php echo do_shortcode('[download url='.$next_attachment_url.']'); ?>