a)
[tex] \huge \frac{20}{3} - \frac{21}{9} {}^{(3} = \frac{20}{3} - \frac{7}{3} =\\ \\ \huge \frac{20 - 7}{3} = \frac{13}{3} [/tex]
b)
[tex] \huge \frac{21}{5} - \frac{27}{15} {}^{(3} = \frac{21}{5} - \frac{9}{5} = \\ \\ \huge \frac{21 - 9}{5} = \frac{12}{5} [/tex]
c)
[tex] \huge \frac{30}{7} - \frac{36}{42} {}^{(6} = \frac{30}{7} - \frac{6}{7} = \\ \\ \huge \frac{30 - 6}{7} = \frac{24}{7} [/tex]
d)
[tex] \huge\frac{41}{6} - \frac{35}{30} {}^{(5} = \frac{41}{6} - \frac{7}{6} = \\ \\ \huge \frac{41 - 7}{6} = \frac{34}{6} {}^{(2} = \frac{17}{3} [/tex]
e)
[tex] \huge \frac{31}{8} - \frac{15}{40} {}^{(5} = \frac{31}{8} - \frac{3}{8} = \\ \\ \huge \frac{31 - 3}{8} = \frac{28}{8} {}^{(4} = \frac{7}{2} [/tex]
