\(7^6+7^5-7^4=7^4\left(49+7-1\right)=7^4.55\)chia hết cho 11
=>ĐPCM
\(24^{54}.54^{24}.2^{10}=8^{54}.3^{54}.27^{24}.2^{24}.2^{10}=2^{162}.3^{54}.3^{72}.2^{34}\)
\(=2^{196}.3^{126}=2^{189}.2^7.9^{63}=8^{63}.9^{63}.2^7=72^{63}.2^7\)chia hết cho 7263
=>đpcm