exponent
exponentiation
https://source.unsplash.com/featured/?exponent#.png
/suto3/google.iconexponent
/suto3/Google画像検索.iconexponent
/suto3/Google定義検索.icon exponent
/suto3/wikipedia.iconexponent
/suto3/weblio.icon exponent
/suto3/kotobank.icon exponent
/suto3/jisho.icon exponent