Remove the parentheses and simplify, if possible.(3m2n2 - 2mn + 1) + (9mn - 3) - (4m2n2 - 30)
A. -m2n2 + 7mn - 32
B. -m2n2 - 11mn + 28
C. 7m2n2 + 7mn - 32
D. -m2n2 + 7mn + 28
Answer: D
Mathematics
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