+1 - -2 +3=, 0 - + 4-4 =, -12 - -10 -2=, -7 - - 3-4=, 19 - 15 + 4=, -16 - -6-10=, -30 - -20-10=, -10 - -25+15=, -11 - +8-19=, -22 - -15-7=, +10 - 70-60=, -20 - -17-3 =, +6 - +12-6=, -21 - -12-9=, +11 - +9+2=, -18 - -17-1=, -2 - -8+6=, -13 - -10-3=, -3 - -1-4+2=, +4 - +10-4-2=, +2 - -7 + 2 + 7=, -40 - -25-10-5=, +25 - + 18 + 3 + 4=, -6 - -8 + 8-6=, +400 - -100 + 200 + 300=,

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