(-2又2分之1)/(-16分之1)*2 -6分之5/(-4分之5)*2分之3-(-2分之1) [-3的2次方-(-4的3次方]/[(-9)-(-4)

(-2又2分之1)/(-16分之1)*2
=40*2
=80
-6分之5/(-4分之5)*2分之3-(-2分之1)
=2/3*3/2+1/2
=1+1/2
=1.5
[-3的2次方-(-4的3次方]/[(-9)-(-4)]
=[-9+64]/[-5]
=55/[-5]
=-11