Olá

[tex]\LARGE{} \frac{5}{4} + \frac{4}{3} - \frac{6}{9} \\ \\ \LARGE{} \frac{5}{4} + \frac{4}{3} - \frac{\cancel{6}}{\cancel{9}} \\ \\ \LARGE{} \frac{5}{4} + \frac{4}{3} - \frac{2}{3} \\ \\ \LARGE{} \frac{5}{4} + \frac{4 - 2}{3} \\ \\ \LARGE{} \frac{5}{4} + \frac{2}{3} \\ \\ \LARGE{} \frac{15 + 8}{12} \\ \\ {\large\boxed{\boxed{  { \large \tt \frac{23}{12} }}}}[/tex]

[tex]{\large\boxed{\boxed{  { \large \tt BONS \: \: ESTUDOS \: MEU \: ANJO \:<3 }}}}[/tex]