номер 70 гдз 8 класс алгебра Муравин Муравина

1)\begin{equation} \frac{25a^{5}b^{3}}{36c} \end{equation} \begin{equation} \frac{25a^{4}b^{2}}{36}\cdot \frac{ab}{c}=\left ( \frac{5a^{2}b}{6} \right )^{2}\cdot \frac{ab}{c} \end{equation} 2) \begin{equation}\frac{49p^{6}x^{7}}{81n^{5}} \end{equation} \begin{equation}\frac{49p^{6}x^{6}\cdot x}{81n\cdot n^{4}}=\left ( \frac{7p^{3}x^{3}}{9n^{2}} \right )^{2}\cdot \frac{x}{n} \end{equation} 3)\begin{equation}\frac{18xy^{8}}{5k^{9}} \end{equation} \begin{equation}\frac{9y^{8}}{k^{8}}\cdot \frac{2x}{5k}=\left ( \frac{3y^{4}}{k^{4}} \right )^{2}\cdot \frac{2x}{5k} \end{equation} 4) \begin{equation}\frac{100b^{10}}{27ac^{3}} \end{equation} \begin{equation}\frac{100\cdot b^{10}}{9\cdot 3c^{2}\cdot a\cdot c}=\left ( \frac{10b^{5}}{3c} \right )^{2}\cdot \frac{1}{3ac} \end{equation}