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-2+1
-1
2.- 8-10÷(-5)
8-(-2)
10
3.- 12÷(-3)+5
-4+5
1
4.- 14÷(-2)-7
-7-7
-14
5.- 8-6÷(-3)
8-(-2)
10
6.- -5+18÷(-9)
-5-2
-7
7.- -1-1÷(-1)
-1+1
0
8.- 4÷3+8÷(-2)
1.3...+(-4)
-2.667
9.- -20×3-80÷20
-60-4
-64
10.- -21÷(-3)-[4×(-8)+1]
-21÷(-3)-[-32+1]
-21÷(-3)-31
7-31
-24