tính
a ) \(\frac{1}{6}-\frac{1}{3}\) b ) \(\frac{15}{48}-\frac{-5}{12}\) c ) \(\frac{-1}{7}-\frac{1}{8}\) d ) \(\frac{-3}{15}-\frac{-3}{25}\)
e ) \(\frac{-6}{13}.\frac{-1}{3}.\frac{-9}{10}.\frac{-13}{36}\) g ) \(\frac{-1}{3}.\frac{-15}{17}.\frac{34}{34}\) h ) \(\frac{1}{3}.\frac{4}{5}+\frac{1}{3}.\frac{6}{5}+\frac{2}{3}\)
n ) \(\frac{-5}{6}.\frac{4}{9}+\frac{-7}{12}.\frac{4}{19}-\frac{40}{57}\) m ) \(\frac{3}{7}.\frac{9}{26}-\frac{1}{14}.\frac{1}{13}-\frac{1}{7}\)