Question

1+2*[(3*4+5*6):7+8*9]

Answer 1

1+2*[(3*4+5*6):7+8*9] = 1+2[(12+30):7+8×9]= 1+2×(42:7+8×9)= 1+2× (6+72)= 1+2×78 = 1+156= 157

Answer 2

1+2×[(3×4+5×6):7+8×9]=
=1+2×[(12+30):7+72]=
=1+2×(42:7+72 )=
=1+2×(6+72)=
=1+2×78=
=1+156=
=157