\(=\dfrac{7}{15}x\dfrac{5}{29}+\dfrac{13}{15}x\dfrac{7}{29}+\dfrac{11}{29}x\dfrac{7}{15}\)
\(=\left(\dfrac{7}{15}+\dfrac{13}{15}+\dfrac{7}{15}\right)x\left(\dfrac{5}{29}+\dfrac{7}{29}+\dfrac{11}{29}\right)=\dfrac{27}{15}x\dfrac{23}{29}=\dfrac{207}{5}\)
\(=\dfrac{7}{15}\times\dfrac{5}{29}+\dfrac{13}{15}\times\dfrac{7}{29}+\dfrac{11}{29}\times\dfrac{7}{15}\)
\(=\left(\dfrac{7}{15}+\dfrac{11}{15}+\dfrac{7}{15}\right)\times\left(\dfrac{5}{29}+\dfrac{7}{29}+\dfrac{11}{29}\right)=\dfrac{27}{15}\times\dfrac{23}{29}=\dfrac{207}{5}\)