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29+(-37)=29-37=-8
(-29)+37=8
(-29)+(-37)=-66
29-(-37)=29+37=66
29-37=-8
b)
37-29=8
37+(-29)=37-29=8
37-(-29)=37+29=66
-37-(-29)=-37+29=-8
-37-29=-66