10. Write the number 7 using five twos and arithmetic operation signs. Find several solutions.
10. 11) $2 \cdot 2 \cdot 2-2: 2$; 2) $2+2+2+2: 2$; 3) $22: 2-2 \cdot 2$. 

10. 11) $2 \cdot 2 \cdot 2-2 \div 2$; 2) $2+2+2+2 \div 2$; 3) $22 \div 2-2 \cdot 2$.