(x - 3)⁵(x + 2)⁶ + (x -3)⁶(x + 2)⁵
      =   (x - 3)⁵(x + 2)⁵[(x + 2) + (x -3)]
      =   (x - 3)⁵(x + 2)⁵(2x - 1)

Enter this as (x - 3)^5*(x + 2)^5*(2*x - 1)

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