Раскройте скобки:

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

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

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