Question

{[(8 - 4 + 3) - 7 + (3 + 15 - 5) + 3] - (7 - 19) + 6} - 12= ​

Answer 1

{[(8 - 4 + 3) - 7 + (3 + 15 - 5) + 3] - (7 - 19) + 6} - 12=

{[(7) - 7 +(13) + 3] - (-2) + 6} - 12

{[0 + (13) + 3] - (-2) + 6} - 12

{[13 + 3] - (-2) + 6} - 12

{[16] - (-2) + 6} - 12

{18 + 6} - 12

{24} - 12

= 12