1) - 3 4/15*13 11/18*23 23/35*19 17/49=
= -(49*245*828*948)/(15*18*35*49)=-(7*46*316)/5=- 99540/5=-19908
2) - 22 3/25*16 8/11*5 25/27*4 7/32=
= - (553*184*160*135)/(25*11*27*32)=-(533*23*8)/11=-(98072)/11
3) (-19908):(-98072/11)=19908*11/98072=218988/98072
4) -7/15*1/24=-7/360
5) 218988/98072:(-7/360)=-218988*360/98072*7=-31284*45/12259=
=1432080/12259=116 10036/12259