[tex]\frac{-4,5\cdot \dfrac{4}{5} -1,8\cdot (-\dfrac{2}{3} )^{2} }{-0,7\cdot \dfrac{5}{14}+ (-\dfrac{3}{4} ) } =\frac{-\dfrac{9}{2} \cdot \dfrac{4}{5} -\dfrac{18}{10} \cdot \dfrac{4}{9} }{-\dfrac{7}{10} \cdot \dfrac{5}{14}-\dfrac{3}{4} }=\\\\\\=\dfrac{-\dfrac{36}{10} -\dfrac{8}{10} }{-\dfrac{1}{4}-\dfrac{3}{4} } =\dfrac{-3,6-0,8}{-1} =\dfrac{-4,4}{-1} =4,4[/tex]
