Question

(5 / x - y) + (7 / x + y) - ( 5x / x2 - y2)

Answer 1

Vamos là.

5/(x - y) + 7/(x + y) - 5x/(x² - y²)

5*(x + y)/(x² - y²) + 7*(x - y)/(x² - y²) - 5x/(x² - y²)

(5x + 5y + 7x - 7y - 5x)/(x² - y²)

(7x - 2y)/(x² - y²)