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B)7-(-3+(-11-(-4)))=7-(-3+(-11+4)=7-(-3+-7)=7-(-3-7)=7--10=7+10=17
C)8×((15-3):2+32:(-4+12))=8*(12:2+32:8)=8*(6+4)=8*10=80
D)(42:(-6-8))×(-5-17):(5-8)=(42:-14)*(-22):(-3)=(-3)*(-22):(-3)=66:(-3)=(-22)