!! +exec+ +var+ +string+
$lst_tit rawmath$lst_titend$type_both
  $(lst_syntax)rawmath $emph expr$emphend</span>
  $lst_mean Translate the mathematical expression $emph expr$emphend,
  possibly with common user errors, into a machine-understandable
  mathematical expression. <br/>
  It will replace $emph (x+1)(x-1)$emphend into $emph (x+1)*(x-1)$emphend,
  $emph 5x^3$emphend into $emph 5*x^3$emphend, etc.
  More precisely,
 <ul><li> 
  Replace some badcharacters as **, ², ³.
   </li><li>translate ++, +-, -+, ... into one sign
   </li><li>
   translate | | in abs
   </li><li>
   replace new lines or tabs by spaces
   </li><li>
   add zero in case of decimal digits if necessary : for example, replace 4. by 4.0  and .5 -> 0.5
   </li><li>
   replace justapositions by multiplications if rawmatheasy=yes 
   </ul> 
   


