(1 1/5+2 3/10):1/2+(6 3/4-2 2/3):1 1/6

1 1/5+2 3/10=6/5+23/10=12/10+23/10=35/10=7/27/2:1/2=7/2*2/1=76 3/4-2 2/3=27/4-8/3=81/12-32/12=49/1249/12:1 1/6=49/12:7/6=49/12*6/7=7/27+7/2=14/2+7/2=21/2=10 1/2=10,5