Преобразуйте в алгебраическую дробь:
- \({\largeа)}\ \frac{a^2-b^2}{2a^2b}\cdot\frac{4ab^2}{a+b};\)
- \({\largeб)}\ \frac{ (x-y)^2}{3x^2y^3}:\frac{x-y}{6xy^2};\)
- \({\largeв)}\ \frac{mn-m^2}{2m}\cdot\frac{8n}{n^2-m^2};\)
- \({\largeг)}\ \frac{2a-4}{b+1}:\frac{a^2-4}{ (b+1)^2};\)
- \({\largeд)}\ \frac{x+y}{x-y}\cdot\frac{x^2-xy}{2x^2-2y^2};\)
- \({\largeе)}\ \frac{16-m^2}{m^2-3m}:\frac{m^2+4m}{m^2-9}.\)