`(3/11 + 11/57) + (11/-79 + 3/-2)`
`= 171/627 + 121/627 + 11/-79 + 3/-2`
`= 292/627 + 11/-79 + 3/-2`
`= 292/627 - 11/79 + 3/-2`
`= 23068/49533 - 6897/49533 + 3/-2`
`= 16171/49533 + 3/-2`
`= 16171/49533 - 3/2`
`= 32342/99066 - 148599/99066`
`= -116257/99066`
Cho mình xin hay nhất nha bạn!!!!
@Drew Mclntyre