$$ 1)\:a^9a^6 = $$ $$ 2)\: \frac{s^6}{s^9} = $$ $$ 3)\: d^5 : d^5 = $$ $$ 4)\: (z^7)^2 = $$ $$ 5)\: n^4 \cdot d^4 = $$ $$ 6)\: (\frac{c}{h})^2 = $$ $$ 7)\:x^7x^7 = $$ $$ 8)\: \frac{p^7}{p^5} = $$ $$ 9)\: h^6 : h^3 = $$ $$ 10)\: (v^9)^2 = $$ $$ 11)\: s^8 \cdot h^8 = $$ $$ 12)\: (\frac{n}{x})^5 = $$