1 . -5 +13=8
2. -8+15=7
3. 6 + -13=-7
4. 7+ -12=-5
5. -53 + 53=0
6.17 + -17=0
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1 . -5 +13=8
2. -8+15=7
3. 6 + -13=-7
4. 7+ -12=-5
5. -53 + 53=0
6.17 + -17=0