2012 chia hết cho 4=>20122015 chia hết cho 4
=>20122015=4k
\(\Rightarrow7^{2012^{2015}}=7^{4k}=\left(7^4\right)^k=\left(...1\right)^k=...1\)
92 chia hết cho 4=>9294 chia hết cho 4
=>9294=4q
\(\Rightarrow3^{92^{94}}=3^{4q}=\left(3^4\right)^q=81^q=\left(...1\right)^q=...1\)
\(\Rightarrow7^{2012^{2015}}-3^{92^{95}}=\left(...1\right)-\left(...1\right)=...0\)chia hết cho 10
=>đpcm