23-5= 26+8= 72+8= 51+9-40=
55+30= 40-6= 32-4= 36-8+4=
16-5= 63-9= 40+60= 6+43+5=
40+29= 7+32= 100-30= 68-6-4=
( )+8=23 42-( )=2 5+( )=64 ( )-7=47