Verified answer

[tex] \frac{4}{13 } + \frac{7}{13} - \frac{2}{13} = \frac{4 + 7 - 2}{13} = \frac{9}{13} \\ \\ 1 - \frac{12}{19} = \frac{19}{19} - \frac{12}{19} = \frac{7}{19} [/tex]