rút gọn phân thứcdytiudtuxfxhfzhzfh

`{6u^2v^2-3u^2}/{4uv^3-8uv^5}`

`={3u^2(2v^2-1)}/{4uv^3(1-2v^2)}`

`=-{3u(1-2v^2)}/{4v^3(1-2v^2)}`

`=-{3u}/{4v^3}`