BEAF
a b = a × a × ⋯ × a ⏟ b 個 の a {\displaystyle a^{b}=\underbrace {a\times a\times \dots \times a} _{b{\text{ 個 の }}a}}
a { 3 } b = a { 2 } ( a { 3 } ( b − 1 ) ) = a { 2 } a { 2 } ⋯ { 2 } a ⏟ b 個 の a {\displaystyle a\{3\}b=a\{2\}(a\{3\}(b-1))=\underbrace {a\{2\}a\{2\}\cdots \{2\}a} _{b{\text{ 個 の }}a}}
a + b = a { 1 } b {\displaystyle a+b=a\{1\}b}
a × b = a { 2 } b {\displaystyle a\times b=a\{2\}b}
a b = a { 3 } b {\displaystyle a^{b}=a\{3\}b}