Разложите на множители:

\(\displaystyle 14hn-49gh+6r\,(2n-7g\,)=\)[ ]\(\displaystyle \big(\)[ ]\(\displaystyle \big)+6r\,(2n-7g\,)=\big(\)[ ]\(\displaystyle \big)\big(\)[ ]\(\displaystyle \big)\)