2 5 50
  This function launches Simpson evaluation of
the total cross section. It is available only for
the 2->2 type of reaction. Convolution of matrix
element with parton distribution is not available
for this function. All cuts except of angle ones
are ignored. 
   Except of integral evaluation the subsequent
sub-menus allows the user to  set precision of 
integral evaluation and display a differential 
cross section as a function of cosine of the  
center-of-mass angle. Also this function provides 
the user with a possibility to display dependence
of total cross section and forward-backward 
integrated asymmetry as a function of any 
parameter  involved in evaluations.  
 