$3 \frac{1}{5}\cdot\frac{7}{4}$

$5^3\cdot\left(-\frac{4}{5}\right)$

$2^4\cdot\frac{5}{8}$

$-\frac{1}{2}\cdot3^2$

$-\frac{5}{6}+\left(\frac{1}{2}\right)^2$

$\left(-\frac{4}{5}\right)^2-\frac{3}{30}$

$\left(\frac{3}{10}\right)^2-\left(-\frac{2}{5}\right)^2$

$8^2\left(-\frac{7}{8}\right)-\frac{1}{2}$