(-3/5)^-2 : (-3/10)^-2 * (-3/4)^-2 - [(-4)^-3 * (-3/8^-3 + (-1/2)^-2 : (-1/3)^-5] - 5/9^0
(-3/5)^-2 : (-3/10)^-2 * (-3/4)^-2 - [(-4)^-3 * (-3/8^-3 + (-1/2)^-2 : (-1/3)^-5] - 5/9^0
(- 3/5)^(-2)/(- 3/10)^(-2)·(- 3/4)^(-2) - ((-4)^(-3)·(- 3/8)^(-3) +
+(- 1/2)^(-2)/(- 1/3)^(-5)) - (5/9)^0 =
=25/9/(100/9)·(16/9) - ((- 1/64)·(- 512/27) + 4/(-243)) - 1=
=1/4·(16/9) - (8/27 + - 4/243) - 1=
=4/9 - (8/27 - 4/243) - 1=
=4/9 - 68/243 - 1=
=- 203/243