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