[tex]4 \times \frac{1}{2} - 1 \times \frac{1}{3} [/tex]
[tex] \frac{9}{2} - \frac{4}{ 3} [/tex]
[tex] \frac{9 \times 3 - 4 \times 2}{6} [/tex]
[tex] \frac{27- 8}{6} [/tex]
[tex] \frac{19}{6} [/tex]
