$$\frac{6}{7}$$

$$\frac{1}{3}$$

$$\frac{1}{3c}$$

$$\frac{3}{7}$$

$$\frac{5}{11z}$$

$$\frac{-5}{z}$$

$$-\frac{5}{11}$$

$$\frac{3}{5z}$$

$$\frac{n}{d}$$

$$\frac{d}{m}$$

$$\frac{m-7}{d}$$

$$\frac{1}{d}$$

$$\frac{5y}{4\left(1+x\right)}$$

$$\frac{5y}{4}$$

$$\frac{5y}{4\left(1-x\right)}$$

$$\frac{5y^2}{4\left(1+x\right)}$$

$$\frac{y-1}{y+1}$$

$$\frac{1-y}{y+1}$$

$$\frac{1}{y+1}$$

$$\frac{y-1}{y^2+1}$$

$$\frac{12b}{7}$$

$$\frac{8b}{7}$$

$$\frac{5b}{21}$$

$$\frac{9b}{21}$$

$$\frac{a^5b^5}{c^2d^4}$$

$$\frac{d}{a^2b^2}$$

$$\frac{cd}{ab}$$

$$\frac{a^2b}{dc^{4\ }}$$

$$\frac{x-y}{9b}$$

$$\frac{1}{9b}$$

$$\frac{b}{x-y}$$

$$\frac{9b}{y-x}$$

$$k^3\left(9-p\right)$$

$$\frac{1}{k^3}$$

$$\frac{9-p}{k^3}$$

2

$$\frac{a-5b}{a+b}$$

$$\frac{a+5b}{a+b}$$

$$a+5b$$

$$a-5b$$

$$5n$$

$$\frac{1}{5}$$

$$\frac{5}{n}$$

$$\frac{n}{5}$$

$$\frac{3\left(x+y\right)}{2}$$

$$\frac{3\left(x-y\right)}{5}$$

$$\frac{2\left(x+y\right)}{5}$$

$$\frac{3\left(x^2+y\right)}{7}$$

$$-\frac{5\left(m+n\right)}{6m}$$

$$-\frac{m+n}{2m}$$

$$-\frac{3\left(m-n\right)}{5m}$$

$$\frac{3\left(m+n\right)}{5m}$$

$$\frac{2\left(a-5\right)}{a+5}$$

$$\frac{2}{a+5}$$

$$\frac{a-5}{a+5}$$

$$\frac{3\left(a+5\right)}{a-5}$$

$$\frac{x+y}{2\left(a^2-ab+b^2\right)}$$

$$\frac{x+y}{2\left(a^2+ab+b^2\right)}$$

$$\frac{x-y}{2\left(a^2-ab+b^2\right)}$$

$$\frac{x-y}{\left(a^2-ab+b^2\right)}$$