2-1 4/5*(1 1/4-1/12):6 = 2-1 4/5*(15/12-1/12):6 = 2-1 4/5*14/12:6 = 2-1 4/5*7/6:6 = 2-9/5*7/6:6 = 2-63/30:6 = 2-63/180 = 2-7/20 = 40/20-7/20 = 33/20 = 1 13/20
2 1/4:3*(1 1/10-3/5)+5/6 = 2 1/4:3*(11/10-6/10)+5/6 = 2 1/4:3*5/10+5/6 = 9/4:3*5/10+5/6 = 9/12*5/10+5/6 = 3/4*5/10+5/6 = 15/40+5/6 = 3/8+5/6 = 9/24+20/24 = 29/24 = 1 5/24