simlify x^2+5x/x^2-3x + x^2-2x/x^2-3x

I am sure you meant

(x^2+5x)/(x^2-3x) + (x^2-2x)/(x^2-3x)
if so , then

= ( x^2 + 5x + x^2 - 2x)/(x^2 - 3x)
= (2x^2 + 3x)/(x^2 - 3x)
= x(2x+3)/(x(x-3))
= (2x+3)/(x-3) , x ≠ 0