56am + 24mu - 24au - 56m² = (56am - 56m²) + (24mu - 24au) =
= 56m(a - m) + 24u(m - a) = 56m(a - m) - 24u(a - m) = (a - m)(56m -24u) =
= 8(a - m)(7m -3u)
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56am + 24mu - 24au - 56m² = (56am - 56m²) + (24mu - 24au) =
= 56m(a - m) + 24u(m - a) = 56m(a - m) - 24u(a - m) = (a - m)(56m -24u) =
= 8(a - m)(7m -3u)