помогите плз
(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=9/102 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