Упростите выражение (y^-2-x^-2)^1*(x^-1-y^-1)

1. The United Kingdom2. the 21st of June3. Prince Harry4. playing football and swimming5. paint,ski and ride motorbikes

Решение(y⁻¹)² - (x⁻¹)² + (y⁻¹ - x⁻¹) = (y⁻¹ - x⁻¹)*(y⁻¹ + x⁻¹) + (y⁻¹ - x⁻¹) == (y⁻¹ - x⁻¹)*(y⁻¹ + x⁻¹ + 1) = [(x - y)/xy]*[(x + y + xy)/xy] == [(x - y)*(x + xy + y)]/x²y²