定义如下：
1.+为一级，*为2，{n}为n+2级，n级在函数表达为$n
2.$a(a)=$1$2(a),$k'$b(a+1)=$k$b($k'$b(a)),$k$b'(a')=$($k$b'(a))b(a)
3.$1$a(a)=$1$1$2,$1$1$a(a)=$1$1$1$2(a)$,$1^n(n个$1)$a(a)=$1^(n+1)$2
w^w
1.+为一级，*为2，{n}为n+2级，n级在函数表达为$n
2.$a(a)=$1$2(a),$k'$b(a+1)=$k$b($k'$b(a)),$k$b'(a')=$($k$b'(a))b(a)
3.$1$a(a)=$1$1$2,$1$1$a(a)=$1$1$1$2(a)$,$1^n(n个$1)$a(a)=$1^(n+1)$2
w^w
