1. EASY

\( 1 + 4 \times 4\)

 
2. EASY

\((1 + 4) \times 4\)

 
3. MEDIUM

\(3 - (2 + 3) \times 5\)

 
4. MEDIUM

\((-3) \times (3+12(4))\)

 
5. MEDIUM

\(6-6 \times (2\div4)\)