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Multiply out all brackets (parentheses).
Combine "like" terms.
"Like" terms are those where any algebraic letters and their powers are exactly the same, but the numbers before them (the coefficients) may be different.
Thus 2x2y and 3x2y are like terms and should be combined to make 5x2y.
But 2x2y and 3xy2 are not like terms since in the first it is x that is squared while in the second it is y. Similarly, x and x2 are not like terms.
Also, when combining terms, remember that x2y is 1x2y.
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