Question

{[9×7-17+2×8]×2-123}+[55-16×(24-21)]×2

Answer 1

{[9*7-17+2*8]*2-123+[55-16*(24-21)]*2=[(9*7-17+2*8)*2-123]+(55-16*3)*2=
=[(63-17+16)*2-123]+(55-48)*2=
=(62*2-123)+7*2=
=(124-123)+7*2=
=1+7*2=1+14=15

Sper ca te-am ajutat! Coronita ? :) :*