Вычислите ((3,9-1 4/5)*1 2/3 / (6 3/4-2,5): 5 2,3)+(3/5-7/18): 3 1/6 /(5/12-4/15))*2,5-5 2/3

39/10-9/5=39/10-18\10=19/10
27/4-25/10=108/20-50/20 =58/20
3/5-7/18=48/90-35/90=13/90
5/12-4/15=25/60-16/60=9/60=3/20
19/10х5/3=57/30х50/30=2850/30
2850/30:58/20=5700/60х60/58=5700/58=2850/29
2850/29:17/3=8550/87х87/493=8550/493
13/90:19/6=13/90х90/19=13/19
13/19:3/20=260/380х380/57=260/57
260/57х25/10=2600/570х1425/570=3705000/570=6500
8550/493+6500=17.169/493+6500=6517.169/493
6517.169/493-5.2/3=6507.14/493