(3,2\3-1,7\9):(1\2-1\4)+(2,1\2+1,3\4)•(3\34 +2\14):9\56 Помогите решить

1) 3⅔-1,7/9=11/3-16/9=(11*3-16)/9=(33-16)/9= =17/9 2) ½-¼=¼ 3) 2½+1¾=5/2+7/4=(5*2+7)/9=(10+7)/9= =17/9 4) 3/34+2/14=(3*14+2*34)/(34*14)=(42+ +68)/476=110/476 5) (17/9):(1/4)=(17*4)/9=68/9 6) (17/9)*(110/476)=(17*110)/(9*476)=1870/4274 7) (1870/4274):(9/56)= (1870/4274)*(56/9)= =(1870*56)/(4274*9)=108720/17116 8) (108720/17116)+(68/9)=2142368/154044 =13целых 139796/154044