Răspuns:
(5+2/3- 5/2+3/2): ( 1•2/5- 7/9)=
= ( 5+2/3- 2/2): ( 2/5- 7/9)=
= (5+2/3- 1): ( 2/5- 7/9)=
= (4+2/3) : ( 2/5- 7/9)=
= (12/3+ 2/3): ( 18/45- 35/45)=
= 14/3: (- 17/45)= - 210/45: 17/45=...
