6 1/4*8-3 2/3*5 1/2+2 2/5*4 7/12
6 1/4*8-3 2/3*5 1/2+2 2/5*4 7/12=45 5/6
6 1/4*8=50
3 2/3*5 1/2= 20 1/6
2 2/5*4 7/12=11
50-20 1/6+11=45 5/6