2 1/3 :(5/8 - 8/3)-2*1 3/7=
1) = - 49/24 2) 21/3:(-49/24)=21/3*(-24/49)= - 3 3/7 3) 2*1 3/7=2*10/7=20/7 4) -3 3/7-20/7=-24/7-20/7=-44/7=-6 2/7
блииин