Question

please solve this problem !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

$\cancel{ {x}^{2}} - \cancel{ {y}^{2}} - \cancel{1} + \cancel{{y}^{2}} - 1 - {x}^{2} + \cancel{1 }- \cancel{{x}^{2} } - {y}^{2}$

$= \boxed{ - 1 - {x}^{2} - {y}^{2} }$

Answer 2

✯SOLUTION ✯

REFERS TO THE ATTACHMENT✯...