(4m²+8)/(m+1)(m²-m+1) -4/(m²-m+1) -1/(-(m+1)=
(4m²+8)/(m+1)(m²-m+1) -4(m²-m+1)+1/(m+1)=
(4m²+8)/(m+1)(m²-m+1)-(4(m²-m+1)(m+1) +1(m²-m+1)(m+1))/(m²-m+1)(m+1)=(4m²+8-5(m³+1))/(m³+1)
при m=0,4
(4m²+8)/(m+1)(m²-m+1) -4/(m²-m+1) -1/(-(m+1)=
(4m²+8)/(m+1)(m²-m+1) -4(m²-m+1)+1/(m+1)=
(4m²+8)/(m+1)(m²-m+1)-(4(m²-m+1)(m+1) +1(m²-m+1)(m+1))/(m²-m+1)(m+1)=(4m²+8-5(m³+1))/(m³+1)
при m=0,4