Bài 2 khó hơn nè : Thực hiện phép tính:
a, \(\dfrac{3}{5}+\dfrac{2}{7}
\)
b , \(\dfrac{-4}{3}:\dfrac{2}{15}\)
c, \(\dfrac{3}{7}.\dfrac{2}{9}+\dfrac{7}{9}.\dfrac{3}{7}\)
d, \(\left(\dfrac{-2}{3}\right)^3.9^2+\left(\dfrac{-3}{4}\right)^2.32\)