Simplify dfrac4x+dfrac5x2\\dfrac{4}{x} + \\dfrac{5}{x^2}dfrac4x+dfrac5x2
dfrac9x2\\dfrac{9}{x^2}dfrac9x2
dfrac4xx2\\dfrac{4x}{x^2}dfrac4xx2
dfrac4+5x+x2\\dfrac{4 + 5}{x + x^2}dfrac4+5x+x2
dfrac4x+5x2\\dfrac{4x + 5}{x^2}dfrac4x+5x2