Dm de 3 eme et galère merci de m'aider mdr

B]
[tex] \frac{10+7*2}{2+5^{2} } - \frac{2}{3} \\ \\ = \frac{10 + 14}{27} - \frac{2}{3} \\ \\ = \frac{24}{27} - \frac{2}{3} \\ \\ = \frac{24}{27}- \frac{18}{27} \\ \\ = \frac{6}{27} \\ \\ = \frac{2}{9} [/tex]

A]
[tex] \frac{ \frac{4}{9}- \frac{5}{6} }{ \frac{3}{4}+1} \\ \\ = \frac{ \frac{24}{54}- \frac{45}{54} }{ \frac{3}{4}+ \frac{4}{4} } \\ \\ = \frac{- \frac{21}{54} }{ \frac{7}{4}} \\ \\ = - \frac{21}{54}* \frac{4}{7} \\ \\ = - \frac{84}{378} \\ \\ =-\frac{2}{9} [/tex]