80-19*3= 80-19*3+210= 100+25*4= 100+25*4/2= 90-36*2= 90-36*2/3=
80-57=23 80-19*3+210=233 100+25*4=200 100+25*2=150 90-72=18 90-36*2/3= 66 36/1*2/3=72/3=24