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6+(-4)+(-10)=-12
-4-(-9)-3=2
-16+7-28=-37
b)4,3-7,4+1,1=-2
(-6,2)+1,6-(-2,30)=-4,6+2,3=6,9
7,8-5,4-12,1=2,4-12,1=-9,7
c)-1(1 trzecia)-2\9+1\6
1 1\8-2 1\4-9-1\2)
(-2,1)+1\5-3