pake sagot po pls pls brainliest ko po

Answer:
Identify whether the following is an expression or an equation.(with solution)
1. 2x² + 3x - 5=2x + x²
2. y + 5+ y² = 0
3. b +b²- 1
4. m²n - mn + 1 = 5mn - 1
5. 3x² + 4x - 5