\(\dfrac{13}{14}-\left(\dfrac{5}{21}+\dfrac{13}{14}\right)=\dfrac{13}{14}-\dfrac{5}{21}-\dfrac{13}{14}=\dfrac{13-13}{14}-\dfrac{5}{21}=0-\dfrac{5}{21}=-\dfrac{5}{21}\)
\(\dfrac{13}{14}-\dfrac{5}{21}-\dfrac{13}{14}=-\dfrac{5}{21}\)
\(=\dfrac{13}{14}-\dfrac{5}{21}-\dfrac{13}{14}=\left(\dfrac{13}{14}-\dfrac{13}{14}\right)-\dfrac{5}{21}=-\dfrac{5}{21}\)
13/14−(5/21+13/14)=13/14−5/21−13/14=13−13/14−5/21=0−5/21=−5/21
\(\dfrac{13}{14}-\left(\dfrac{5}{21}+\dfrac{13}{14}\right)\)
\(=\dfrac{13}{14}-\dfrac{5}{21}-\dfrac{13}{14}\)
\(=-\dfrac{5}{21}\)
\(\dfrac{13}{14}-\left(\dfrac{5}{21}+\dfrac{13}{14}\right)=\left(\dfrac{13}{14}-\dfrac{13}{14}\right)-\dfrac{5}{21}=0-\dfrac{5}{21}=-\dfrac{5}{21}\)