README.md in danica-2.0.3 vs README.md in danica-2.0.4

@@ -123,14 +123,9 @@
 end
 ```
 
 #### Sample
 ```ruby
-require 'danica/operator/product'
-require 'danica/operator/sum'
-require 'danica/operator/division'
-require 'danica/operator/power'
-
 module Danica
   class Function::Spatial < Function
     variables :time, :acceleration, :initial_space, :initial_velocity
     delegate :to_tex, :to_gnu, to: :sum