Bài 2:
a: \(=\dfrac{-4}{3}+\dfrac{7}{6}+\dfrac{1}{2}\)
=-8/6+7/6+3/6=3/6-1/6=2/6=1/3
b: \(=\dfrac{3}{5}\left(\dfrac{5}{4}-\dfrac{1}{4}\right)=\dfrac{3}{5}\)
c: \(=\dfrac{11}{23}\left(\dfrac{12}{17}+\dfrac{5}{17}\right)+\dfrac{12}{23}=\dfrac{11}{23}+\dfrac{12}{23}=1\)