Simplify dfrac21x+dfrac22x2\\dfrac{21}{x} + \\dfrac{22}{x^2}dfrac21x+dfrac22x2
dfrac21x+22x2\\dfrac{21x + 22}{x^2}dfrac21x+22x2
dfrac43x2\\dfrac{43}{x^2}dfrac43x2
dfrac21+22x+x2\\dfrac{21 + 22}{x + x^2}dfrac21+22x+x2
dfrac21xx2\\dfrac{21x}{x^2}dfrac21xx2