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12:3=4
-4+4=0
= -4 - ((-6×2):3)
= -4 - (-12:3)
= -4 - (-4)= -4+4 = 0
2. 8 - (-12) : 4 + (-3)^2
= 8- (-12:4)+ (-3)²
= 8- (-3) + 9=8+3+9= 20
3. (-10 - 3)^2 - (-15 - (-20))^3
= (-13)²- (-15+20)³= (-13)²- (5)³
= 169-125= 44
4. (-12 + 6)^2 + (17 + (-5))^2
= -6²+ 12²=36+144= 180
semoga membantu.... ^_^