Question

8 класс помогите пожалуйста!!!

Answer 1

= $\frac{y+x+1}{xy} +\frac{x^4y^3-x^3y^4}{x+y+1} *\frac{y^2+x^2+xy}{x^2y^2} + \frac{1}{x^3-y^3} = \frac{1}{xy} *x^2*xy^2*y*(x-y)*\frac{y^2+x^2+xy}{x^2y^2} *\frac{1}{(x-y)*(x^2+xy+y^2)} = 1$