Math Help - Algebra 2 polynomial addition/subtraction?

1. Algebra 2 polynomial addition/subtraction?

$(2x+1)/(x^2+4x+4) - (6x)/(x^2-4) + 3/(x-2)$

Please help explain how to solve this? Thanks!

2. Re: Algebra 2 polynomial addition/subtraction?

$\frac{2x+1}{(x+2)^2} - \frac{6x}{(x-2)(x+2)} + \frac{3}{x-2}$

you need a common denominator ...

$(x+2)^2(x-2)$