80-19*3=
80-19*3+210=
100+25*4=
100+25*4/2=
90-36*2=
90-36*2/3=

80-57=2380-19*3+210=233100+25*4=200100+25*2=15090-72=1890-36*2/3= 66 36/1*2/3=72/3=24