22. Упростите: 2(8m−5n+4c)−8(2m+4n−7c)+5(m−8n+2c)−4(8m−2n+c)

Раскрываем скобки: \(16m−10n+8c−16m−32n+56c+5m−40n+10c−32m+8n−4c=−27m−74n+70c\).

Ответ: \(−27m−74n+70c\).