[tex]d) \: ( \frac{7}{9} + \frac{17}{10} \: - \frac{1}{18}) - ( \frac{13}{27} - \frac{1}{18}) = \frac{539}{270} [/tex]
[tex]( \frac{7}{9} + \frac{17}{10} - \frac{1}{18}) = \frac{109}{45} [/tex]
[tex]( \frac{13}{27} - \frac{1}{18} ) = \frac{23}{54} [/tex]
[tex] \frac{109}{45} - \frac{23}{54} = \frac{539}{270} [/tex]
[tex]e)( \frac{13}{63} + \frac{17}{45} ) - ( \frac{5}{36} - \frac{1}{27} ) = \frac{1823}{3780} [/tex]
[tex]( \frac{13}{63} + \frac{17}{45} ) = \frac{184}{315} [/tex]
[tex]( \frac{5}{36} - \frac{1}{27} ) = \frac{11}{108} [/tex]
[tex] \frac{184}{315} - \frac{11}{108} = \frac{1823}{3780} [/tex]
