\(\frac{-5}{9}.\frac{3}{11}-\frac{3}{11}.\frac{13}{18}\)
\(=\frac{3}{11}.\left(\frac{13}{18}-\frac{-5}{9}\right)\)
\(=\frac{3}{11}.\frac{23}{18}\)
\(=\frac{23}{66}\)
\(\frac{-5}{9}.\frac{3}{11}-\frac{3}{11}.\frac{13}{18}\)
\(=\frac{3}{11}.\left(\frac{13}{18}-\frac{-5}{9}\right)\)
\(=\frac{3}{11}.\frac{23}{18}\)
\(=\frac{23}{66}\)
\(-\frac{5}{9}\cdot\frac{3}{11}-\frac{3}{11}\cdot\frac{13}{18}\)=\(\frac{3}{11}\cdot\left(-\frac{5}{9}-\frac{13}{18}\right)\)
=\(\frac{3}{11}\cdot\frac{-23}{18}\)
=\(\frac{-23}{66}\)