Раскройте скобки:

\(\displaystyle -15 \cdot (-s-t\,)=\)[?||-][ ][?|+|-][ ]

\(\displaystyle -(-u-v\,)=\)[?||-][ ][?|+|-][ ]

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