(4 13/18-3 7 /9)*(1/2-4/17)

(4 13/18-3 7 /9)*(1/2-4/17)=19/68 13*1 — 7*2 (4 13/18-3 7 /9)=(4-3)+(13/18-7/9)=1+-=1+1/18=1 1/18 18 1*17 — 4*2 17 — 8 9 (1/2-4/17)=-=-=- 34 34 341 1/18*9/34=19/18*9/34=19/68