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1 Answer

Try the rule for adding exponents when multiplying terms:

x=(1000000000000000000001)^20

 

x^2+x =[(1000000000000000000001)^20]*[(1000000000000000000001)^20] +             

             (1000000000000000000001)^20

      =  {(1000000000000000000001)^40}  + (1000000000000000000001)^20

Don't let all the zeros baffle you.

BruceS