[tex]\left(\dfrac{4}{3}\right)^2 - \left(\dfrac{7}{6}\right)^2 = {{\dfrac{16}{9}}^{^{\displaystyle (4}}} - \dfrac{49}{36} =[/tex]
[tex]= \dfrac{64}{36} - \dfrac{49}{36} = \dfrac{64-49}{36} ={^{^{^{^{^{^{\displaystyle 3)}}}}}}}\!\!\!\dfrac{15}{36} = \dfrac{5}{12}[/tex]
