\text{Suppose for all integers}x,\text{there are two functions}\mathrm{ f}\text{ and}\mathrm{ g }\text{such that}

$$\begin{gathered} \\ \mathrm{ f}\left(x\right)+f(x-1)=0\text{and}g\left(x\right)=x^2,f(x^2-x)=5, \end{gathered}$$

\text{then the value of the sum}f\left(g\right(5\left)\right)+g\left(f\right(5\left)\right)\text{is}