$2 - rac{3a}{a-b} = $

$a - rac{a^2}{a-b} = $

$\frac{1}{x} + \frac{2}{x(x-2)} = $

$\frac{5}{x(x+1)} - \frac{3x}{x+1} = $

$\frac{7x}{5x+1} + \frac{x}{x+2} = $

$\frac{3-x}{x^2-1} + \frac{2}{x+1} = $

$\frac{4}{x+1} + \frac{2x}{x^2-1} = $

$\frac{5+3x}{x^2-4} - \frac{3}{x-2} = $