Question

[1/5 + 3/5 · (2 - 1/3)^2] : 7 + 1/15

Answer 1

[1/5 + 3/5 · (2 - 1/3)^2] : 7 + 1/15

[1/5 + 3/5 (6/3 - 1/3)^2]   :7 + 1/15

1/5 + 3/5 (5/3)^2] : 7 + 1/15

1/5 + 3/5. 25/9 : 7 + 1/15

1/5 + 75/45 : 7 + 1/5

1/5 + 75/315 + 1/5

63/315 + 75/315 + 63/315 = 201/315 = 67/105

saludos