Odpowiedź:
[tex]-0,3m^2n+0,5m^3+1,4m^2n+2m^3=\\\\=0,5m^3+2m^3-0,3m^2n+1,4m^2n=\boxed{2,5m^3+1,1m^2n}[/tex]
[tex] - 0.3 {m}^{2} n + 0.5 {m}^{3} + 1.4 {m}^{2} n + 2 {m}^{3} = 1.1 {m}^{2} n + 2.5 {m}^{3} [/tex]
