\(M< \frac{x+t}{x+y+z+t}+\frac{y+z}{x+y+z+t}+\frac{x+z}{x+y+z+t}+\frac{y+t}{x+y+z+t}\)
\(\Rightarrow M< \frac{\left(x+t\right)+\left(y+z\right)+\left(x+z\right)+\left(y+t\right)}{x+y+z+t}\)
\(\Rightarrow M< \frac{2\left(x+y+z+t\right)}{x+y+z+t}\Rightarrow M< 2\)
\(\Rightarrow M^{10}< 2^{10}\Rightarrow M^{10}< 1024\Rightarrow M^{10}< 1025\)