-3/7. 5/9 + 4/9 . -3/7 +(-2022)0
= -3/7 . ( 5/9 + 4/9) + 1
= -3/7 . 1 + 7/7
= -3/7 + 7/7
= 4/7
`3) [-3] / 7 . 5 / 9 + 4 / 9 . [-3] / 7 + (-2022)^0`
`=[-3] / 7 ( 5 / 9 + 4 / 9 ) + 1`
`=[-3] / 7 . 9 / 9 + 1 `
`=[-3] / 7 + 1`
`=[-3] / 7 + (7) / 7`
`= [4 ]/ 7`