Основной пример не пишу, начну сразу с решения.
a^2/3b^2/3 -a^4/3 a^2/3(b^2/3 - a^2/3)
( _____________ - 1 )*(a^1/3 -b^1/3)^ -1= (____________________ - 1)*
ab^1/3 -a^1/3b a^1/3b^1/3(a^2/3 - b^2/3)
- a^2/3 (a^2/3 - b^2/3) 1
*(a^1/3 - b^1/3) ^-1=( ____________________ - 1)*(____________) =
a^1/3b^1/3 (a^2/3 - b^2/3) a^1/3 - b^1/3
-a^1/3 b^1/3 1 a^1/3 - b ^1/3 1
=(_______ - _____ )*(__________) = _ _____________ * __________ =
b^1/3 b^1/3 a^1/3 - b^1/3 b^1/3 a^1/3 - b^1/3
_ ___1__
b^1/3