Simplify dfrac20x+dfrac21x2\\dfrac{20}{x} + \\dfrac{21}{x^2}dfrac20x+dfrac21x2
dfrac20+21x+x2\\dfrac{20 + 21}{x + x^2}dfrac20+21x+x2
dfrac20xx2\\dfrac{20x}{x^2}dfrac20xx2
dfrac20x+21x2\\dfrac{20x + 21}{x^2}dfrac20x+21x2
dfrac41x2\\dfrac{41}{x^2}dfrac41x2