Question:`2 - [3 - {6 - { (5 - bar4 - 3) } ]`
Answer
Given Expression , ` = 2 - [3 - { 6 - (5 - 1) } ]` `= 2 - [3 - {6 - 4} ]` `= [3 - 2]` `= (2 - 1)` `= 1`.