48-5 x 7+9 x 3-19
150-3 x (10-2 x 3) +20 =
R=-307
25-2 x 4+8 x (19-3 x 4)=
8-6+5-2 x 2
R=25
R=183
201-2*(25-3*4)+(50/10)+3
R=158
45-40 x 8-2 x 20+(400/100) x 2
R=3
50+(350/50)-4 x (10-2)
R=21
R=73
