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2.-3.1 + 3.1.-5 - 4.-3.-5
-6 + (-15) - 60
21 - 60
-39
2. (2àb-c pangkat 2)pangkat 2
(2.-3.1 - (-5)pangkat 2) pangkat 2
(-6) pangkat 2 - (25)pangkat 2
-36 - 625
-661