\frac{3}{4} \div \frac{2}{1} \times \frac{1}{4} \+ \frac{2}{6} \frac{3}{4} \times \frac{1}{2} \times \frac{1}{4} \+ \frac{2}{6}

$latex  \frac{8}{3} \times \frac{1}{4} \+ \frac{2}{6}$

\frac{8}{12} \+ \frac{2}{6} \frac{8}{12} \+ \frac{4}{12} \frac{12}{12}