Respuesta :

23/4 - [31/8 ÷ (5-{42/3 -11/12})]

= 23/4 - [31/8 ÷ (5- 157/12)]

= 23/4 - [31/8 ÷ -92/12]

=23/4 - [31/8×-12/92]

=23/4 - -93/184

= 23/4 + 93/184

= 1151/184