Выполни деление алгебраических дробей

а) \(\dfrac{a}{b}:\dfrac{c}{d}=\) [ ];

б) \(\dfrac{3}{x}:\dfrac{4}{y}=\) [ ];

в) \(\dfrac{3}{4x}:\dfrac{x-1}{2x}=\) [ ];

г) \(\dfrac{6}{x+1}:\dfrac{9x}{2(x+1)}=\) [ ];

д) \(\dfrac{14}{3x-3}:\dfrac{7x}{4x-4}=\) [ ];

е) \(\dfrac{3x+2}{x-2}:\dfrac{6x+4}{5x-10}=\) [ ];

ж) \(\dfrac{7x-7}{2x-3}:\dfrac{1-x}{3-2x}=\) [ ];

з) \(\dfrac{x+8}{4x-4}:\dfrac{16+2x}{3-3x}=\) [ ].