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= 9/10 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