m²+(-n²)+(6m²×7n²)-7mn×(-2mn)
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Answer:
m2−n2+6m2x7n2−7mnx((−2m)(n))
=m2+−n2+6m2n2x7+14m2n2x
Answer:
=6m2n2x7+14m2n2x+m2−n2
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