Find the average of $\frac{1}{2}$12 and $\frac{2}{3}$23.
Simplify the expression $\frac{1}{3+\frac{1}{4}}$13+14.
Simplify the expression $\frac{\frac{7}{10}-\frac{3}{5}}{\frac{1}{5}}$710−3515.
Simplify the expression $\frac{\frac{1}{9}}{\frac{1}{4}-\frac{1}{8}}$1914−18.