﹛2又2/3﹣［（1.5×2又2/3﹚÷1/6﹣1又1/7］﹜÷8/3

﹛2又2/3﹣［（1.5×2又2/3﹚÷1/6﹣1又1/7］﹜÷8/3
=﹛2又2/3﹣［（3/2×8/3﹚*6﹣8/7］﹜*3/8
=﹛8/3﹣［（3/2×8/3﹚*6﹣8/7］﹜*3/8
=﹛8/3﹣［4*6﹣8/7］﹜*3/8
=﹛8/3﹣［24﹣8/7］﹜*3/8
=﹛1﹣［9﹣3/7］﹜
=﹛1﹣［60/7］﹜
=-53/7
= -7又4/7