I'm trying to solve the equation    

diff(y(x), x) = -A*y(x)/x+x^alpha*(C+(y(x)^alpha/x^alpha-C)^(-gamma))/y(x)^alpha 

i.e

and I'm getting the following answer

y(x) = RootOf(-ln(x)-Intat(_a^alpha/(_a^(1+alpha)*A-C-(_a^alpha-C)^(-gamma)+_a^(1+alpha)), _a = _Z)+_C1)*x

i.e

Please tell me what exactly is '_a' and '_Z'. I'm finding it hard to understand this language.