Question

12•{110-10•[9•8-9•(15-8)]}

Answer 1

12*{110-10*[9*8-9*(15-8)]}=
=12*[110-10*(72-9*7)]=
=12*[110-10*(72-63)]=
=12*(110-10*9)=
=12*(110-90)=
=12*20=
=240