(8 1/42-12 4/21)-(-5 1/3-3 3/7)
(8 1/42 – 12 4/21) – (– 5 1/3 – 3 3/7) 1) (337/42 – 256/21) – (– (5 1/3 + 3 3/7)) 2) (– 25/6) – (– ((5 + 3) + (1/3 + 3/7))) 3) – 25/6 – (– (8 + 16/21)) 4) – 25/6 – (– (– 8 16/21)) 5) – 25/6 + 8 16/21 6) – 25/6 + 184/21 7) 193/42 = 4 25/42