$$x^{n}=nx^{n-1}; (2p.12)p0$$
$\left\{\begin{matrix}\\x=n\text{, }y=\frac{6pp_{0}}{25}\text{, }&\text{unconditionally}\\x=0\text{, }y=\frac{6pp_{0}}{25}\text{, }&n\neq 1\end{matrix}\right.$
$\left\{\begin{matrix}x=n\text{, }y=\frac{6pp_{0}}{25}\text{, }&n>0\text{ or }\left(n<0\text{ and }Denominator(n)\text{bmod}2=1\right)\\x=0\text{, }y=\frac{6pp_{0}}{25}\text{, }&n>1\end{matrix}\right.$