wordpress functions

I dont know much about functions please forgive my inexperience. I have these functions added to my functions.php file on a hosted wordpress site. They work on my admin user account and on a test user account, but not on other user accounts. Below are the functions. Any help is appreciated.

add_action(‘screen_options_show_screen’,’remove_screen_options’,13);
function remove_screen_options(){ return false;}
if(!current_user_can(‘contributor’,’author’,’editor’,’edit_others_posts’))
add_action(‘after_setup_theme’,’remove_post_formats’,11);
function remove_post_formats() {
remove_theme_support(‘post-formats’);}
add_action(‘after_setup_theme’,’remove_post_thumbnails’,14);
function remove_post_thumbnails() {
remove_theme_support(‘post-thumbnails’);}