Срочно!!!!!
-3 6/7 + (-5 7/17)
-7/9 + (11/15)
-3 11/12 + (-4 9/16)
-3 7/8 + (-2 1/9)
+6 2/9 + +2 5/6

-3 6/7 + (-5 7/17)=-8 13/17-7/9 + (11/15)=-35/45+33/45=-2/45-3 11/12 + (-4 9/16)=-3 44/48-4 27/48=-7 71/48=-8 23/48-3 7/8 + (-2 1/9)=-3 63/72-2 8/72=-5 71/72+6 2/9 + +2 5/6=6 4/18+2 15/18=8 19/18=9 1/18