Simplify dfrac7x+dfrac8x2\\dfrac{7}{x} + \\dfrac{8}{x^2}dfrac7x+dfrac8x2
dfrac7+8x+x2\\dfrac{7 + 8}{x + x^2}dfrac7+8x+x2
dfrac7xx2\\dfrac{7x}{x^2}dfrac7xx2
dfrac15x2\\dfrac{15}{x^2}dfrac15x2
dfrac7x+8x2\\dfrac{7x + 8}{x^2}dfrac7x+8x2