5+=7
8+=19
47+=81
-3=4
-13=28
-45=48
92-=55
98-=52
103-=44
27+72=
38+49=
53+67=
7×8=
3×7=
4×6=

+49=99-66
-34=23+37
42++21=97
24+32+29+14=
28+=51-
46+53-34-59=
-43=+24
100-18-39-43=