30:(1716,19-516,19)+(73,5-44,5):7

1716,19-516,19=120030:1200=30*1/1200=1/4073,5-44,5=2929:7=29/7=4 1/71/40+4 1/7=7/280+4 40/280=4 47/280

30:(1716,19-516,19)+(73,5-44,5):730:1200+29:80,025+29/71/40+29/71167/280