evalaute given m=-2 and n = 6 , 3m3 + 2m2n + n3
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m= -2
n = 6
=3m3 + 2m2n + n3
=3×-2×3 + 2×-2×2×6 + 6×3
=-18 + (-48) + 18
=-18 - 48 + 18
=-48 ans
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