a−na^{-n}a−n = ……
am×a−ma^m\times a^{-m}am×a−m = ……
(20−30)×40(2^0-3^0)\times4^0(20−30)×40 = ……
The general form of 1.275×1031.275\times10^31.275×103 ……
8x+18^{x+1}8x+1 = 1 then x = …
1000100^01000 = ……
2−4=12n2^{-4}=\frac{1}{2^n}2−4=2n1 then n = ……
aman\frac{a^m}{a^n}anam (m < n) = ……
a×a×a×....×aa\times a\times a\times....\times aa×a×a×....×a (2016 times) = …
2−1+1−12^{-1}+1^{-1}2−1+1−1 = ….