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  % math
  Mathematica 3.0 for Solaris
  Copyright 1988-97 Wolfram Research, Inc.
  -- Motif graphics initialized -- 

  In[1]:= Cos[a*x]*Sech[b*x]

  Out[1]= Cos[a x] Sech[b x]

  In[2]:= Series[%,{x,0,5}]

                 2    2         4    2  2      4
               -a    b    2    a    a  b    5 b    4       6
  Out[2]= 1 + (--- - --) x  + (-- + ----- + ----) x  + O[x]
                2    2         24     4      24

  In[3]:= Quit

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