aidez svp pour les exercices 84 et 85 Merci d'avance!!!!

EXERCICE 85

[tex]\frac{2}{9} + \frac{4}{3} * \frac{1}{6} +\frac{5}{3}= \frac{2}{9} + \frac{4}{18} + \frac{5}{3} = \frac{4}{18} + \frac{4}{18} + \frac{30}{18}= \frac{38}{18} = \frac{19}{9} \\ \\ (\frac{2}{9}+ \frac{4}{3})*( \frac{1}{6} + \frac{5}{3})= ( \frac{2}{9}+ \frac{12}{9})*( \frac{1}{6}+ \frac{10}{6})= \frac{21}{9}* \frac{11}{6}= \frac{231}{54}= \frac{77}{18} \\ [/tex]

[tex] \frac{17}{6} * \frac{9}{2} - \frac{11}{4}* \frac{8}{3} = \frac{153}{12}- \frac{88}{12}= \frac{65}{12} [/tex]

[tex] \frac{17}{6} *( \frac{9}{2} - \frac{11}{4} )* \frac{8}{3} = \frac{17}{6} *( \frac{18}{4} - \frac{11}{4} )* \frac{8}{3} = \frac{17}{6} * \frac{7}{4} * \frac{8}{3} = \frac{952}{72} = \frac{119}{9} [/tex]