1. +5 -3 +10 -15 +6 +8 = +11
+5 +10 +6 +8= -29
-3 -15 = -18
+29 - 18 = +11
2. +10 -7 -21 +15 +16 - 33 = -20
+10 +15 +16 = +41
-7 -21 -33 = -61
-61 +41 = -20
3. -21 -35 -41 +15 -13 +35 = -60
+15 +35 = + 50
-21 -35 -41 -13 = -110
-110 +50 = -60
4. -52 +13 -21 -35 +17 -3 = -82
+13 +17 = +30
-53 -21 -35 - 3 = -112
-112 +30 = -82
5. -1017 -1035 +371 -7 +457 -325 = -1556
+371 +457 = +828
-1017 -1035 -7 -325 = -2384
-2384 +828 = -1556
6. +975 -355 -450 +600 -700 -311 +57 - 1 = -185
+975 +600 +57 = +1632
-355 -450 -700 -311 -1 = -1817
-1817 + 1632 = -185
7. +57 +66 -37 -46 +13 -15 +17 +18 = +83
+67 +66 +13 +17 +18 =+181
-37 -46 -15 = -98
+181 -98 = +83
8. -13 +14 -13 -15 -13 +21 +7 -21 = -33
+14 +21 +7 = +42
-13 -13 -15 -13 21 = -75
-75 +42 = -33
9. -10 -15 -25 +25 +15 +10 - 1 = -1
+25 +15 +10 = +50
-10 -15 - 25 -1 = -51
-51 + 50 = -1
10. -3 -5 +2 -1 +7 -3 -7 -8 -10 = -19
+2 +7 +9 = +18
-3 -5 -1 -3 -7 -8 -10 = -37
-37 +18 = -19
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