\(M=\dfrac{8^{10}+4^{10}}{8^4+4^{11}}\)
\(M=\dfrac{\left(2^3\right)^{10}+\left(2^2\right)^{10}}{\left(2^3\right)^4+\left(2^2\right)^{11}}\)
\(M=\dfrac{2^{30}+2^{20}}{2^{12}+2^{22}}\)
\(M=\dfrac{4^{15}+4^{10}}{4^6+4^{11}}\)
\(M=\dfrac{4^{10}\left(4^5+1\right)}{4^6\left(4^5+1\right)}\)
\(M=\dfrac{4^{10}}{4^6}\)
\(M=4^4=256\)