Four Operations

[nycmath]

[(1/2) + (3/4)] - [(5/7) - (7/6)] • [(4/5)(3/4)] ÷ [(5/6) ÷ (8/9)] =

[Eigenvalue]

[tex]\frac{5}{4}[/tex]-[tex]\frac{30-49}{42}[/tex]*[tex]\frac{3}{5}[/tex]÷[tex]\frac{15}{16}[/tex]
=[tex]\frac{5}{4}[/tex]-[tex]\frac{(-19)}{70}[/tex]*[tex]\frac{16}{15}[/tex]
=[tex]\frac{5}{4}[/tex]-[tex]\frac{-152}{525}[/tex]
=[tex]\frac{3233}{2100}[/tex]

[nycmath]

[tex]\frac{5}{4}[/tex]-[tex]\frac{30-49}{42}[/tex]*[tex]\frac{3}{5}[/tex]÷[tex]\frac{15}{16}[/tex]
=[tex]\frac{5}{4}[/tex]-[tex]\frac{(-19)}{70}[/tex]*[tex]\frac{16}{15}[/tex]
=[tex]\frac{5}{4}[/tex]-[tex]\frac{-152}{525}[/tex]
=[tex]\frac{3233}{2100}[/tex]

Use a calculator and away we go. How is this done without a calculator?