1+1  =   2.0   [1] 
   This is a comment.   
sin((π+0.5)*1E50)**2+cos((π+0.5)*1E50)**2  =   1.0   [2] 
   The next expression can be created by clicking on both sides of equation [2]:   
sin((π+0.5)*1E50)**2+cos((π+0.5)*1E50)**2 + 1.00  =   2.0   [3] 
   Note what ans can do for you:   
1/3  =   0.333333333333 …   [4] 
1/3-ans  =   0.0 …   [5] 
   as opposed to:   
1/3-0.333333333333333333  =   3.33333333333E-19 …   [6] 
   URL of a sequence can be emailed or bookmarked. It is not encrypted.   
   However, the following expression may often give different results.   
ln(dice)  =   1.60943791243 …   [7] 
1/ans  =   0.621334934560 …   [8] 
   Expression [8] shows as a comment only if expression [7] returns 0.   
   The print link prints only expressions and comments, not the whole page.   
   :-)