Respuesta :

[tex] (m^{2} -m+3)+(m-1) [/tex]
[tex]= m^{2} -m+3+m-1 [/tex] . . . . . . . . (opening the brackets)
[tex]= m^{2} -m+m+3-1 [/tex] . . . . . . . . (collecting like terms)
[tex]= m^{2} +2[/tex]