$2 - (2a)/(a - b) =$

$a - (a^2)/(a - b) =$

$1/x + 2/(x(x - 2)) =$

$5/(x(x + 1)) - (2x)/(x + 1) =$

$(7x)/(5x + 1) + x/(x + 2) =$

$(3 - x)/(x^2 - 1) + 2/(x + 1) =$

$4/(x + 1) + (2x)/(x^2 - 1) =$

$(5 + 3x)/(x^2 - 4) - 3/(x - 2) =$