$$ 1)\:h^9h^4 = $$ $$ 2)\: \frac{y^3}{y^9} = $$ $$ 3)\: k^2 : k^8 = $$ $$ 4)\: (e^9)^5 = $$ $$ 5)\: d^4 \cdot z^4 = $$ $$ 6)\: (\frac{v}{q})^5 = $$ $$ 7)\:v^2v^9 = $$ $$ 8)\: \frac{q^9}{q^8} = $$ $$ 9)\: s^3 : s^8 = $$ $$ 10)\: (s^2)^6 = $$ $$ 11)\: f^2 \cdot n^2 = $$ $$ 12)\: (\frac{z}{e})^9 = $$