Question

{4*[5+(45+15*7)-(28/4*6)*3]-98}=

Answer 1

{4[5+(45+15*7)-(28/4*6)3]-98}=
{4[5+(45+105)-(7*6)3]-98}=
{4[5+150-42*3]-98}=
{4[155-42*3]-98}=
{4[155-126]-98}=
{4*29-98}=
{116-98}=
{18}