$2\sqrt{2} \times 3\sqrt{2} = $

$4\sqrt{36} \times 2\sqrt{25} = $

$0.0000019 \times 10^{-5} = $

$0.0000025 = $

$49000 = $

$\sqrt{3^2} = $

$2\sqrt{50} + \sqrt{32} + 3\sqrt{72} = $

$\sqrt{16} - 5\sqrt{25} = $

$\frac{3^{-7} \times 3^{-7}}{2^5 \times 2^5} = $

$\frac{7^{-3} \times 7^{-4}}{2^4 \div 2^5} = $

$5^2 \div 5^{-3} = $