Huge IT Gallery

I want to replace an image that is part of a theme in the PHP file with the gallery but it doesn’t work and just a ton of mumbo-jumbo code appears where the phone is on my homepage: https://www.mouseoverdesigns.com.

Here is a copy of the code in theme:
<img src=”<?php echo esc_url( $bizlight_home_about_right_image );?>” />

Here is the gallery code:
<?php echo do_shortcode(“[huge_it_gallery id=’3′]”); ?>

Which then looks like this:
<img src=”<?php echo do_shortcode(“[huge_it_gallery id=’3′]”); ?>” />

What am I doing wrong?