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Posted by **Dezy** on Tuesday, October 20, 2009 at 6:01pm.

4^n+4n-4n^2 + (2^n-2n)

- Math -
**jim**, Tuesday, October 20, 2009 at 6:08pmThis is really just like the other one - but simpler. You don't even need the brackets, assuming the question is written correctly:

4^n + 4n -4n^2 + 2^n - 2n

(4n - 2n = 2n, sp)

4^n + 2^n - 4n^2 + 2n

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