1) 121^(-5) * 121 ^ ( - 6) = 121 ^ ( - 5 - 6) = 121 ^ ( - 11 )
==========================================
2) 121 ^ ( - 11) / 121 ^ ( -10) = 121 ^ ( - 11 - ( - 10 )) = 121 ^ ( - 11 + 10 ) =
= 121 ^ ( - 1 ) = 1 / 121
==========================================