Question

(x+y^-1) (x^-1+y-1)​

Answer 1

=(x+(1÷y))((1÷x)+y-1)

=(x × (1÷x))+(x × y)+(x × -1)+((1÷y)×(1÷x))+((1÷y)×y)+((1÷y)×-1)

=1+xy+(-x)+(1÷xy)+1+(-1÷y)

=2+xy -x+(1÷xy)-(1÷y)

Hope it helps u.