title: Insert a space between a numerical number and character
body: <p>I have an mathematical equation </p>
  
  <pre><code>var equation="(4+5.5)*3+4.5+4.2";
  </code></pre>
  
  <p>When i do </p>
  
  <pre><code>equation.split('').join(' ');
  </code></pre>
  
  <p>It gets output, space between each character.</p>
  
  <pre><code>( 4 + 5 . 5 ) * 3 + 4 . 5 + 4 . 2
  </code></pre>
  
  <p>How to do insert a space between numerical number and alpha character? </p>
  
  <p>Sample Output :</p>
  
  <pre><code>( 4  +  5.5 ) *  3  +  4.5  +  4.2
  </code></pre>
  
  <p>Have anyone can help me how to figure out, thanks in advance.</p>