Question

x²-y²-1 + y²-1-x² + 1-x²-y² add.. pls help fast​

Answer 1

Answer:

I have to answer 1000 question quickly so iam doing this please don't delete my answer

Answer 2

Answer:

x^2-y^2-1+y^2-1-x+1-x^2-y^2

=-y^2-1-x