Question

1+2×[3+4×(5+6×7)]-8×9

Answer 1

1+2×[3+4×(5+42)]-72
1+2×(3+4×47)-72
1+2×(3+188)-72
1+2×191-72
1+382-72
383-72
310
sper ca e corect....

Answer 2

1+2x[3+4x(5+6x7)]-8x9=
=1+2x[3+4x47]-72=
1+2x191-72=
1+382-72=311