Question

Помогите пожалуйста.

Answer 1

Oooooooooooooooooooooooo

Answer 2

$\frac{7}{x^{2}-y^{2} }-\frac{5}{xy-x^{2} } -\frac{12}{x^{2}+xy}=\frac{7}{(x-y)(x+y)}-\frac{5}{x(y-x)}-\frac{12}{x(x+y)}=\frac{7}{(x-y)(x+y)}+\frac{5}{x(x-y)}-\frac{12}{x(x+y)}=\frac{7x+5x+5y-12x+12y}{x(x-y)(x+y)}=\frac{17y}{x(x^{2}-y^{2})}$