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