(1)23-6×(-3)+2×(-4)-|-5|=23+18-8-5=43-13=30;;(2)-12-[1 3 7 +(-12)÷6]2×(? 3 4 )3.=-1-[1 3 7 -2]2×(- 27 64 ).=-1-[- 4 7 ]2×(- 27 64 ).═-1- 16 49 ×(- 27 64 ).-1+ 27 196 = 169 196