Thực hiện các phép tính sau bằng cách nhanh nhất :
a, \(\frac{5}{11}\)+ \(\frac{1}{2}\) + \(\frac{2}{5}\)+ \(\frac{6}{11}\) + \(\frac{16}{26}\) + \(\frac{5}{16}\)
b, \(\frac{19}{4}\) + \(\frac{37}{100}\)+ \(\frac{1}{8}\)+ \(\frac{132}{25}\) + \(\frac{5}{2}\) + \(\frac{27}{12}\)
c, ( \(\frac{121}{122}\)x\(\frac{123}{125}\)+\(\frac{127}{129}\)) x ( \(\frac{1995}{1996}\)x\(\frac{17}{16}\)-\(\frac{21}{25}\):\(\frac{16}{17}\)) x ( \(\frac{42}{30}\)x\(\frac{75}{23}\)-\(\frac{19}{23}\)x\(\frac{210}{38}\))