1、(-125)÷17+315÷17-(-166)÷17-(-1/17)
=(-125+315+166+1)/17
=357/17
=21
2、(-5)x[-3(6/7)-15x9/7+[5/8-(3/8+1/6-3/4)x24]
=(-5)x(-18/7)-135/7+(5/8-9-4+18)
=90/7-135/7+(5/8+5)
=-45/7+45/8
=-45/56
3、【-2】三次方-【-1】的2次方】x【103】2次方÷3 ”13二次方+1÷1“...
=(-8-1)*100/9*(1/3)
=-100/3