Раскройте скобки:

\(\displaystyle -11\cdot (-a+b\,)=\)[?||-][ ] [?|+|-][ ]

\(\displaystyle -(-s+t\,)=\)[?||-][ ][?|+|-][ ]

\(\displaystyle -a\cdot (-b+c\,)=\)[?||-][ ][?|+|-][ ]