Вычислить: 81^-0,75 + (1/125) ^-1/3 - (1/32) ^-3/5

81=3^4; 125=5^3; 32=2^5

81^ (-0,75) = (1/3^4) ^ (3/4) = (1/3) ³ = 1/27

(1/125) ^ (-1/3) = ∛5³=5

(1/32) ^ (-3/5) = 32^ (3/5) = (2^5) ^ (3/5) = 2^3=8

исходное выражение = 1/27 + 5 - 8 = - 3 + 1/27 = - 2 26/27