Answer:
-6m2 - 16mw + 5w2
Explanation:
(-10m2 - 11mw – 7w2) - (-4m2 + 5mw – 12w2) =
= -10m2 - 11mw – 7w2 + 4m2 - 5mw + 12w2
= (-10m2 + 4m2) -(11mw + 5mw) + (12w2 -7w2)
= -6m2 - 16mw + 5w2
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