$2 - 2 \times (3 - 1)$

$\frac{3 \times 2 + 2}{5^2 \times 2}$

$3 \times 2^2 - (3^2 + 2)$

$\frac{12 \div (7 - 5) + 3 \times 5}{3^3 + 2^3}$

$2^3 + 1 - 2 \times 3^2$

$(10^2 - 5^2) \times (3^2 \div 19)$