thực hiện phép tính
a) \(\dfrac{9}{18}-\dfrac{-7}{12}+\dfrac{13}{32}\) b) \(\dfrac{5}{-8}+\dfrac{14}{39}-\dfrac{6}{10}\) c) \(\dfrac{11}{26}+\dfrac{32}{39}-\dfrac{-14}{52}\)
help me!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!