[tex]a)(3 - \frac{1}{3} ) \times ( \frac{9}{8} ) {}^{2} [/tex]
[tex] \frac{8}{3} \times \frac{81}{64} [/tex]
[tex] \frac{27}{8} [/tex]
[tex]b) \frac{3}{4} \div ( \frac{3}{4} - \frac{1}{2}) - \frac{4}{9} [/tex]
[tex] \frac{3}{4} \div \frac{1}{4} - \frac{4}{9} [/tex]
[tex] \frac{3}{4} \times 4 - \frac{4}{9} [/tex]
[tex]3 - \frac{4}{9} [/tex]
[tex] \frac{23}{9} [/tex]
