Question

{76-[42+(12-6) +3]-10}-2=

Answer 1

{76-[42+(12-6)+3]-10}-2=
{76-[42+6+3]-10}-2=
{76-51-10}-2=
15-2=
13

Answer 2

{76-[42+(12-6)+3]-10}-2 = {76-[42+6+3]-10}-2 = {76-[48+3]-10}-2 = {76-51-10}-2 = {25-10}-2 = 15-2 = 13