8 3/17 * 5 1/4 + 3 14/17 * 5 1/4 = (8 3/17+3 14/17)* 5 1/4=12*5 1/4=60 12/4=63
3 4/13 * 15 3/41-3 4/13 * 2 3/41 = (15 3/41-2 3/41)*3 4/13=13*3 4/13=39 52/13=43
(2 3/4+4 1/8)*1 5/11=11/4*16/11+33/8*16/11=4+6=10
1 2/5*(1 1/14-5/7)=7/5*15/14-7/5*5/7=3/2-1=1/2