Преобразуйте в алгебраическую дробь:
- \({\largeа)}\ \frac{\vphantom{0}a}{b}\cdot\frac{c}{d};\)
- \({\largeб)}\ \frac{\vphantom{0}x}{y}:\frac{a}{b};\)
- \({\largeв)}\ \frac{4a}{7b}\cdot\frac{21}{a};\)
- \({\largeг)}\ \frac{5}{8}:\frac{15q}{16p};\)
- \({\largeд)}\ \frac{5ax}{6by}\cdot\frac{3x}{5y};\)
- \({\largeе)}\ \frac{7}{a}\cdot\frac{5ax}{14by};\)
- \({\largeж)}\ \frac{8a^2y}{5bx}:\frac{3ay}{4b^2x};\)
- \({\largeз)}\ \frac{25x^2y^3}{36ab}:\frac{35x^3y}{24b^2}.\)