48+=79
28+=92
91+=167
-33=45
-37=73
-36=163
99-=65
128-=66
198-=122
33+47=
65+77=
147+147=
3×8=
4×7=
6×7=

-28=77-42
11+26+33+45=
73-37=+24
55+33+47-121=
36++56=138
76+67-29-92=
38+-39=66
200-12-65-48=