\(\left(-\dfrac{7}{5}+-\dfrac{3}{4}\right)\)\(.\)\(\left(\dfrac{1}{2}+\dfrac{4}{5}\right)\)
\(=-\dfrac{43}{20}\)\(.\)\(\dfrac{13}{10}\)
\(=\dfrac{559}{200}\)
\(\left(\dfrac{-7}{5}+\dfrac{-3}{4}\right)\times\left(\dfrac{1}{2}+\dfrac{4}{5}\right)\\ =\left(\dfrac{-28}{20}+\dfrac{-15}{20}\right)\times\left(\dfrac{5}{10}+\dfrac{8}{10}\right)\\ =\dfrac{-43}{20}\times\dfrac{13}{10}\\ =\dfrac{-559}{200}\)