Question

Помогите пожалуйста))

Answer 1

(x^2-y^2)/xy^2 / x-y/xy= (x-y)(x+y)/xy^2 * xy/x-y= (x+y)/y

Answer 2

1. $( \frac{x}{y^{2} } - \frac{1}{x} ) : ( \frac{1}{y} - \frac{1}{x} )$
2. $\frac{x^{2}-y^{2} }{y^{2} x} : \frac{x-y}{xy}$
3. $\frac{(x+y)(x-y)}{y^{2} x}$·$\frac{xy}{x-y}$
4. $\frac{(x+y)(xy)}{(y^{2}x)(x-y) }$