$\frac{2}{3} \times \frac{-1}{4} + 3 \frac{1}{2} =$

$\frac{5}{6} - \frac{3}{8} \div (4 \div \frac{-6}{5}) =$

$2 \times \frac{1}{3} - 4 \div \frac{2}{3} - (-\frac{1}{2}) =$

$-\frac{1}{2} + \frac{-3}{4} \div \frac{1}{8} \times \frac{5}{6} + \frac{1}{2} =$