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(3 1/3+5 1/6)*2/5-2 3/4:(1 1/2-2/5) =
3 1/3*2 2/5*(2-4 8/15*3/17) =

1 пример.

(3 1/3+5 1/6)*2/5-2 3/4:(1 1/2-2/5)=
(10/3+31/6)*2/5-11/4:(3/2-2/5)=
(20/6+31/6)*2/5-11/4:(15/10-4/10)=
51/6*2/5-11/4:11/10=
51/3*1/5-11/4*10/11=
51/3*1/5-1/2*5/1=
51/15-5/2=
102/30-75/30=
27/30=
9/10

2 пример.

3 1/3*2 2/5*(2-4 8/15*3/17)=
10/3*12/5*(2-68/15*3/17)=
2/1*4/1*(2-4/5*1/1)=
8*(2-4/5)=
8*(1 5/5-4/5)=
8*1 1/5=
8/1*6/5=
48/5=
9 3/5