$\frac{18^7 \div 6^7}{3^7} =$

$\frac{2^7 \times 3^9}{9^2 \times 2^4} =$

$(a^4 \times b^4) \div (ab)^{10} =$

$3^2 \times 3^5 \times 9^2 \times 6^5 =$

$\frac{5^2 \times 6^5}{5 \times 6^2} =$

$\sqrt{20} + \sqrt{45} =$

$36^5 \div ,^5 \div [(-2)^5 \times (-13)^5] =$