(-3)(-5)=
-27/-3=
-10/+5=
-7-9-2+8-3+1=
(-7)(+3)(-10)=
-2+4-8-3-11-10+25=
(+2)(-5)(+3)=
+8-3+9-5+2-10=
+77/-7=
+8-3+9-5+2-1=
+9
-5
+15
-30
-12
-11
+1
10
+210
-2
