7,2:6+5,16:4=
16,5:5+13,28:4=
15,4:7-4,83:3=
9,5:5+74,25:5=
36,15:5+55,32:6=
19,72:2 - 22,54:7=
37,74:3 - 21,32:4=
35,76:4 + 96,15:5=