Question

2/3 menos abre corchete 5/4 mas abre parentesis 3/2 por 7/5 cierra parentesis cierra corchete mas 7/4

Answer 1

2/3 - { 5/4 +( 3/2 × 7/5) } +7/4
2/3 - { 5/4 + 21/10} +7/4
2/3 - 67/20 +7/4
- 161/60 + 7/4
-133/30