[tex]\Large\boxed{\begin{array}{l}\sf\dfrac{2}{3}+\dfrac{1}{2}-\dfrac{1}{6}\\\\\begin{array}{c|c}\sf3,2,6&\sf2\\\sf3,1,3&\sf3\\\sf1,1,1,\end{array}\\\sf m\cdot m\cdot c~(3,2,6)=2\cdot3=6\\\\\sf\dfrac{2}{3}+\dfrac{1}{2}-\dfrac{1}{6}=\dfrac{4+3-1}{6}=\dfrac{6}{6}=1\end{array}}[/tex]
