Why do I get 800A03ED / 800A03EE errors?

Microsoft JScript compilation error '800a03ed'  Expected '('    or    Microsoft VBScript compilation error '800a03ee'  Expected ')'

 
These are typically very simple typographical errors. Here are some reproduction scripts, and how to fix them: 
 

<script language=jscript runat=server>  function foo  {      bar = 1;  }  </script>

 
To fix, becomes: 
 

<script language=jscript runat=server>  function foo()  {      bar = 1;  }  </script>

 
And, 
 

<%      x = y + (305 - Clng("5")  %>

 
To fix, becomes: 
 

<%      x = y + (305 - Clng("5"))  %>