Add: 5b^3-8b+2b^2 and 3b^2-7b^3+5b





      5b^3 - 8b + 2b^2

    + 3b^2 - 7b^3 + 5b

   ______________________





Note: You can online add like terms. Terms which are exactly the same

      aside from the coefficient.



       5b^3 and - 7b^3 are like terms

        2b^2 and 3b^2 are like terms too

         -8b and 5b are like terms.



Arrange your expressions like this



           5b^3 + 2b^2 - 8b

       +  -7b^3 + 3b^2 + 5b

      ______________________

          -2b^3 + 5b^2 - 3b



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