(2/3)^-2 - (1/9)^-1 + (6/7)^0 * 1/8 - 0.25^-2 *16 ; найдите значение выражения ?

1) (2\3) ^ (-2) = (3\2)^2 = 9\4 = 2.25
2) 1\9 ^ (-1) = 9
3) 6\7 ^ 0 = 1
4) 1 * 1\8 = 1\8
5) 0.25 ^ ( -2 ) = 1\4 ^ ( -2) = 4 ^2 = 16
6) 16 * 16 = 256
................................................................................
7) 2.25 - 9 + 1\8 - 256 = - 265 + 2 1\4 + 1\8 = - 265 + 2 2\8 + 1\8 = - 265 + 2 3\8 =
= - 264 8\8 + 2 3\8 = - 262 5\8 = ( - 262.625 )