2 2/3 - 25 : 12,5 : (9-6*1 1/6) * (-2)
4/5 - (1,2*5/12-0,8) : (-1/8)
4,5*1 2/3 - 3,75 : 5/9 - 10/27 : (-5/6)
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2 2/3 - 25 : 12,5 : (9-6*1 1/6) * (-2)=
8/3-2:2*(-2)=4i2/3
4/5 - (1,2*5/12-0,8) : (-1/8)=
0,8-(-0,5):(-0,125)=-3,2
4,5*1 2/3 - 3,75 : 5/9 - 10/27 : (-5/6)
9/2*5/3-15/4*9/5-10/27*(-6/5)=
15/2-27/4+12/27=
(810-729+48)/108=129/108=1i21/108