Simplify dfrac3x+dfrac4x2\\dfrac{3}{x} + \\dfrac{4}{x^2}dfrac3x+dfrac4x2
dfrac3x+4x2\\dfrac{3x + 4}{x^2}dfrac3x+4x2
dfrac7x2\\dfrac{7}{x^2}dfrac7x2
dfrac3+4x+x2\\dfrac{3 + 4}{x + x^2}dfrac3+4x+x2
dfrac3xx2\\dfrac{3x}{x^2}dfrac3xx2