$\frac{1}{22}$

$\frac{1}{14}$

$10xy+5z$

$2x+5y+5z$

$12xyz$

$64\longrightarrow\ \ 8\longrightarrow\ \ 625\longrightarrow\ \frac{1}{32}$

$12\longrightarrow\ \ 9\longrightarrow\ \ 20\longrightarrow\ \frac{1}{10}$

$81\longrightarrow\ \ -81$

$-12\longrightarrow\ \ -12$

$-81\longrightarrow\ \ -81$

$\frac{1}{7}$

$\frac{5}{12}$

$\frac{1}{12}$

$\frac{10}{7}$

$\frac{11}{10}$

$\frac{4}{7}$

$\frac{5x+6}{10}$

$\frac{x+8}{7}$

$\frac{11x}{10}$

$\frac{7x}{15}$

$\frac{2-x}{8}$

$\frac{10-3x}{15}$

$\frac{8}{3}$

$\frac{2}{3}$

$\frac{1}{6}$

$\frac{2}{9}$

$\frac{10}{24}$

$\frac{x}{12y}$

$\frac{4x}{3y}$

$\frac{49x}{48y}$

$\frac{3x}{64y}$

$\frac{x+16y}{12}$

$\frac{4xy}{3}$