1) (a - 5) / (5a^3 - 1) - a / a^4Упрощаем первое слагаемое:(a - 5) / (5a^3 - 1) = (a - 5) / ((5a)^3 - 1) = (a - 5) / (125a^3 - 1)
2) x^2 / (x^2 - 49) - x / (x + 7)(x^2) / ((x + 7)(x - 7)) - x / (x + 7)x^2 / (x^2 - 49) - x / (x + 7)
1) (a - 5) / (5a^3 - 1) - a / a^4
Упрощаем первое слагаемое:
(a - 5) / (5a^3 - 1) = (a - 5) / ((5a)^3 - 1) = (a - 5) / (125a^3 - 1)
2) x^2 / (x^2 - 49) - x / (x + 7)
(x^2) / ((x + 7)(x - 7)) - x / (x + 7)
x^2 / (x^2 - 49) - x / (x + 7)