oblicz [(2 1/2) do potegi minus 1] do potegi 2 razy (5/2) do potęgi 2 ( 7 3/5) do potęgi minus 3 podzielone (3/19) do potęgi minus 3

[(2 1/2)^-1]^2 * (5/2)^2=[(5/2)^-1]^2 * (5/2)^2 = (5/2)^ (-1*2) * (5/2)^2 = (5/2)^-2 * (5/2)^2 = 1/(5/2)^2 * (5/2)^2 = 1 ( 7 3/5)^3 / (3/19)^ -3 = (38/5)^3 / (19/3)^3 = 38^3/5^3 / 19^3/3^3 = 38^3/5^3 * 3^3/19^3 = (2*19)^3/125 * 27/19^3 =( 2^3 * 19^3 )/125 * 27/19^3 = 2^3/125 * 27 = 8/125 * 27 = 216/125 = 1 91/125