(4/5 - 2/3 : 7/15) - 3/2 =
7/3 ( 1/2 + 1/4) + 1/2 - 5 =
5 ( 2/4 + 1/3) : (-2) =
( 1/3 - 5/3 - 1/4) (-3) =
plissss
(4/5 - 2/3) / (7/15) - 3/2 =-(17/14)
7/3 ( 1/2 + 1/4) + 1/2 - 5 =-11/4
5 ( 2/4 + 1/3) : (-2) =-25/12
( 1/3 - 5/3 - 1/4) (-3)=19/4
saludes