\(A=\frac{\left(2^3\right)^{10}+\left(2^2\right)^{10}}{\left(2^3\right)^4+\left(2^2\right)^4}=\frac{2^{30}+2^{20}}{2^{12}+2^8}=\frac{2^{20}\left(2^{10}+1\right)}{2^8\left(2^4+1\right)}=\frac{2^{12}\left(2^{10}+1\right)}{2^4+1}\)
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