$a^2$ = ? a a a a a a a a a a a a a a a a a a a a a a a a a a a 1

$a^6$ = ? a a a a a a a a a a a a a a a a a a a a a a a a a a a 1

$a^3$ = ? a a a a a a a a a a a a a a a a a a a a a a a a a a a 1

$a^0$ = ? a a a a a a a a a a a a a a a a a a a a a a a a a a a 1