Add 2x+3x2\dfrac{2}{x} + \dfrac{3}{x^2}x2+x23.
2x+3x2\dfrac{2x+3}{x^2}x22x+3
5x+x2\dfrac{5}{x+x^2}x+x25
5x3\dfrac{5}{x^3}x35
6x3\dfrac{6}{x^3}x36