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