Подстановка условия
[src]1/(x - y) - 1/(y - x) - 2*x/(x^2 - y^2) при y = 1/3
1/(x - y) - 1/(y - x) - 2*x/(x^2 - y^2)
−x2−y22x+x−y1−−x+y1 1/(x - (1/3)) - 1/((1/3) - x) - 2*x/(x^2 - (1/3)^2)
−−(1/3)2+x22x+−(1/3)−x1+−(1/3)+x1 1/(x - 1/3) - 1/(1/3 - x) - 2*x/(x^2 - (1/3)^2)
−x2−912x+x−311−−x+311 1/(-1/3 + x) - 1/(1/3 - x) - 2*x/(-1/9 + x^2)
−x2−912x+x−311−−x+311