#Examples of the use of series
> series(1/(1-4*x)^2,x=0);
 
                            2        3         4         5      6
              1 + 8 x + 48 x  + 256 x  + 1280 x  + 6144 x  + O(x )
 
> series(1/sqrt(1-4*x),x=0);
 
                             2       3       4        5      6
                1 + 2 x + 6 x  + 20 x  + 70 x  + 252 x  + O(x )
 
> series(sqrt(1-4*x),x=0);
 
                              2      3       4       5      6
                 1 - 2 x - 2 x  - 4 x  - 10 x  - 28 x  + O(x )
 
> series(1/(1-4*x)-1/sqrt(1-4*x),x=0);
 
                           2       3        4        5      6
                 2 x + 10 x  + 44 x  + 186 x  + 772 x  + O(x )