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  1. W=[0,1]
  2. W+1=[1,1]
  3. W*2=[0,2]
  4. Z = 2*W*(W+2)+W+1=[1,5]
  5. (2*(W+1)).pow(3)=[8,24]
  6. 2*W*Z.pow(2)=[0,2]
  7.  
  8. let  X = [F(X),dF(X)] = [0,1]
  9. let  Y = 2*X*(Sin(X)+1)
  10. then Y = [F(Y),dF(Y)] = [0,2]
  11.  
  12. let  U = [F(U),dF(U)] = [1.5708,1]
  13. let  V = 2*U*(Sin(U)+1)
  14. then V = [F(V),dF(V)] = [6.28319,4]
  15.