(2 5/7-1 3/5) :1,3 - (1 3/7)·0,25 (19/7-8/5) :1,3 - (10/7)·0,25
----------------------------------------- = --------------------------------------- =
(2/5 -7/18) ·15 (2/5)·15 -(7/18) ·15
[ (95-56)/35]·10/13-(10/7)·(1/4) (39/35)·(10/13)-5/14
= ----------------------------------------- = ------------------------------ =6·(6/7 -5/14)=
6-35/6 1/6
=6·(12-5)/14=6/2=3