Simplify the following
(m+n) (msquare-mn+nsquare)
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(m+n) (m^2-mn+n^2)
=multiply m^2-mn+n^2 by m and then n
=m^3 -m^2mn +mn^2+nm^2 -mn^2 +m^3
=m^3+n^3
=multiply m^2-mn+n^2 by m and then n
=m^3 -m^2mn +mn^2+nm^2 -mn^2 +m^3
=m^3+n^3
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