How can I call shortcode that includes a shortcode inside

Hi I have the 2 shortcodes function one that pick up the latest news but within that news article I would like in the middle of the text a shortcode to display an image in the middle.

the problem is that when I run the latestnews shortcode it doesnt run the other shortcode within a shortcode.

[image_shortcode] == <img src"image" >

example- article:
The forums.digital is a greate forum its helpfull and great to meet new people [image_shortcode] almost everyday I came here to chat to people.

call the article:
[latestnews]
Incorrect Result:
The forums.digital is a great forum its helpfull and great to meet new people [image_shortcode] almost everyday I came here to chat to people.

The result I want
Article:
The forums.digital is a great forum its helpfull and great to meet new people <img src"image.gif" > almost everyday I came here to chat to people.

This is my shortcode functions

Latest news


//[latestnews]
<?php
//function to display the latest news published one post only
function wptuts_latestnews_shortcode($atts, $content=null) {
   query_posts(array('orderby' => 'date', 'order' => 'DESC' , 'showposts' => 1 , 'category_name' => 'Blog / News'));
   if (have_posts()) :
      while (have_posts()) : the_post();
	  global $more;    // Declare global $more (before the loop).
		$more = 0;       // Set (inside the loop) to display content above the more tag.
		
         $return = get_the_content  ("» read more") ;
      endwhile;
   endif;
   wp_reset_query();
   return $return_string;
}
add_shortcode( 'latestnews', 'wptuts_latestnews_shortcode');
?>

Image shortcode


//[image]
<?php
function wptuts_image_shortcode($atts, $content=null){

    $tweet = '<a img="img2.gif" href="/news/" title=" latest news">latest news</a>';

    return $image;
  }

  add_shortcode('image', 'wptuts_twitter_shortcode');

?>

I have tried the do_shortcode

$return = get_the_content  ("» read more") . do_shortcode($content) ;

But the image just display at the end of the article I want in the middle of the article