${\frac{1}{6}}^{/5}+{\frac{3}{5}}^{/6}=\frac{5}{30}+\frac{18}{30}=\frac{23}{30}$

$\frac{11}{12}-<!--\; -\; -->{\frac{1}{4}}^{/3}=\frac{11}{12}-<!--\; -\; -->\frac{3}{12}=\frac{8}{12}=\frac{2}{3}$

${\frac{5}{14}}^{/2}+{\frac{3}{4}}^{/7}=\frac{10}{28}+\frac{21}{28}=\frac{31}{28}=1\frac{3}{28}$

${\frac{13}{24}}^{/2}-<!--\; -\; -->{\frac{5}{16}}^{/3}=\frac{26}{48}-<!--\; -\; -->\frac{15}{48}=\frac{11}{48}$

${\frac{7}{8}}^{/5}+{\frac{3}{10}}^{/4}=\frac{35}{40}+\frac{12}{40}=\frac{47}{40}=1\frac{7}{40}$

${\frac{11}{15}}^{/3}+{\frac{2}{9}}^{/5}-<!--\; -\; -->{\frac{3}{5}}^{/9}=\frac{33}{45}+\frac{10}{45}-<!--\; -\; -->\frac{27}{45}=\frac{43}{45}-<!--\; -\; -->\frac{27}{45}=\frac{16}{45}$