1: Rút gọn
a)\(\frac{56}{720}\) b)\(\frac{-360}{300}\) c)\(\frac{4.7.22}{33.14}\) d)\(\frac{3^5.2^4}{8.3^6}\) e)\(\frac{9.6-9.2}{18}\) f)\(\frac{4116-14}{10290-35}\) g)\(\frac{2929-101}{2.1919+404}\)
2: Cho các phân số sau tối giản:
a)\(\frac{n+1}{2n+3}\) b)\(\frac{2n+3}{3n+5}\) c)\(\frac{12n+1}{30n+2}\)