algebra

Find the sum in simplest form.

7mn + 5m^2 + 3n^2 + 2mn

a) 15m^2n^2 + 9mn
b) 7mn + 5m^2 +3n^2 + 2mn
c) 15m^2n^2 + 9m^2n^2
d) 5m^2 +3n^2 + 9mn

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  1. i think i figure out this answer myself its d but i could be wrong

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  2. d is it
    the 2 and the 7 mn s are all the like terms you can combine

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  3. (−5m + 7mn) − (2mn + 7m)

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