Упростить
(5+m^2)-(m-3)(m+3)-2(m+4)

Раскрой скобки и сократи

m^3-5m^2+5m-1 = m^3-3m^2+3m-1 - (2m^2 - 2m) = (m-1)^3 - 2m(m-1) = (m-1) ( (m-1)^2 - 2m ) = (m-1) ( (m-1)^2 - 2(m-1) + 1 - 3) = (m-1) ( (m-2)^2 - 3) =  как(m-1) ( m - (2 + sqrt(3)) ) ( m - (2 - sqrt(3)) )