$ \frac{6/3 \div 0/7}{2/1 \div 0/3} \times \frac{14 \times 3}{9 \times 2} = \frac{9}{7} \times \frac{14 \times 3}{9 \times 2}=3 $ $ [6 \times \frac{1 - \frac{1}{3}}{2 - \frac{2}{3}}] \div [8 \times \frac{1 - \frac{2}{3}}{1 + \frac{1}{3}}] = [6 \times \frac{\frac{2}{3}}{\frac{4}{3}}] \div [8 \times \frac{ \frac{1}{3}}{\frac{4}{3}}]=(6\times \frac{1}{2})\div (8\times \frac{1}{4}) =3\div 2=1/5 $ $ 0/5 \times (9/75 - 3/25) =0/5 \times 6/5=3/25 $ $ ( 12/3 - 7 ) - ( 8/8 - 3/62 ) = 5/3-5/18=0/12 $