Thực hiện phép tinh:
a)\(\frac{4}{x+2}\)+ \(\frac{2}{x-2}\)+\(\frac{5x-6}{4-x^2}\)
b)\(\frac{1-3x}{2x}\)+\(\frac{3x-2}{2x-1}\)+\(\frac{3x-2}{2x-4x^2}\)
c)\(\frac{1}{x^2+6x+9}\)+\(\frac{1}{6x-x^2-9}\)+\(\frac{x}{x^2-9}\)
d)\(\frac{x^2+2}{x^3-1}\)+\(\frac{2}{x^2+x+1}\)+\(\frac{1}{1-x}\)
e)\(\frac{x}{x-2y}\)+ \(\frac{x}{x+2y}\)+\(\frac{4xy}{4y^2-x^2}\). Giúp Mk nha