Раскройте скобки:

\(\displaystyle -2\cdot (f+g\,)=\)[?||-][ ] [?|+|-][ ]

\(\displaystyle -(k+l\,)=\)[?||-][ ][?|+|-][ ]

\(\displaystyle -m \cdot (k+s\,)=\)[?||-][ ][?|+|-][ ]